Buffalo

Buffalo (pronounced buhf-uh-loh)

(1) An animal from the subtribe Bubalina, also known as true buffalos, such as the Cape buffalo, Syncerus caffer, or the water buffalo, Bubalus bubalis.

(2) A related North American animal, the American bison (zoologically incorrect but in use thus since the 1630s).

(3) An ellipsis of buffalo robe.

(4) As the buffalo fish, the Ictiobus spp.

(5) In numismatic slang, a clipping of Buffalo nickel (a copper–nickel five-cent piece struck by the US Mint 1913-1938) and still (rarely) used of nickels.

(6) In numismatic slang, a clipping of “American buffalo” (a gold bullion coin), still used by collectors.

(7) A locality name most prevalent in North America, the Lake Erie port in western New York, the best-known,

(8) A shuffling tap-dance step (associated with the popular song “Shuffle Off to Buffalo”, from the musical film 42^nd Street (1933).

(9) As “buffaloed by”, to be puzzled or baffled; to be confused or mystified.

(10) As “to buffalo”, to impress or intimidate by a display of power, importance etc.

(11) To hunt buffalo (archaic).

(12) To assault (historically, to “pistol-whip”).

1535–1545: An early Americanism (replacing buffel, from the French, noted since the 1510s), from the Spanish or Portuguese búfalo (water buffalo), from the Italian buffalo, from Late Latin būfalus (an alteration of the Classical Latin būbalus (wild ox)), from the Ancient Greek βούβαλος (boúbalos).  The Greek form was originally the name of a kind of African antelope, later used of a type of domesticated ox in southern Asia and the Mediterranean lands.  I’s a word of uncertain origin and the elements may include bous (ox, cow, from the primitive Indo-European root gwou- (ox, bull, cow) but it may be a Greek folk-etymology.  The use of “buffalo” to describe the American bison is a mistake dating from the 1630s and it has endured so long as to become institutionalized.  The other Germanic words (the Dutch buffel, the German Büffel, the Danish böffel etc) are from the French while the Russian buivolu, the Polish bujwoł and the Bulgarian bivol came from the Medieval Latin.  The “Buffalo gnat” was first recorded in 1822 while the term “Buffalo chip” (dung of the American bison used as a fuel) was in use by at least the 1840s.  The origin of the name of the city Buffalo in western New York is disputed, not least because there were never any bison in close proximity to the place.  It may have been based on the name of a native American (ie Red Indian) chief or a corruption of the French beau fleuve (beautiful river).  The use of “buffalo” as a verb meaning “alarm” was documented early in the twentieth century and is probably related to the tendency of the beasts to mass panic.  In many fields, “buffalo” is used as a modifier for many words.  The old synonym buffle is extinct.  Buffalo is a noun & verb, buffaloed & buffaloing are (informal) verbs and buffaloish (non-standard) & buffalo-like are adjectives; the noun plural is buffaloes or buffalos but if used collectively (ie of a herd) buffalo is the usual spelling.  The common collective noun for a group of buffalo is “herd” although “gang” is a recorded US regionalism and some prefer the more evocative “obstinacy”, the label gained by virtue of the beast’s well-documented quality of stubbornness.

Classy Leather’s illustration of the difference in texture between bison and buffalo leather.

The clipping “buff” also tracked a varied path.  Predictably, the word seems first to have been simply a short form of “buffalo” but by the 1560s traders were using it to describe the thick, soft leather obtained from the hides of the creatures which were being slaughtered by the million although then it was almost always spelled “buffe” (ie as “buffe leather”) from the French buffle.  Buff was by the 1780s used generally to describe a “light brownish-yellow” color, based on the hue assume by the buffalo leather in its process form and as early as circa 1600 the old association of “hide” with “skin” led to the phrase “in the buff” (naked), strengthened by buff leather and pale human skin being similar in hue.  Over time, “buff naked" emerged and this morphed into "buck naked," possibly influenced by use of the word “buck” which, in American slang, had been used to refer to male deer, Native Americans, or African-American men in certain contexts. The exact etymological connection is debated, but “buck” here may have been used to evoke an image of primal or raw naturalism.  The evolution continued and by the early nineteenth century there was also “butt naked” obviously more explicit and descriptively accessible to a modern audience, emphasizing the state of stark nudity by referencing the buttocks.  It’s now the most popular of the three slang forms.  All three are unrelated to the use of “buff” to mean “polish a metal to a high gloss”, that based on the original “buffing cloths” being off-cuts of a “buff-coat” (a military overcoat originally made from the hide).  A tool for this purpose is often still called “a buff”.  The noting of “polishing up” by “buffing” was taken up in video gaming (especially role-playing) where it meant “to make a character or an item stronger or more capable”.

Jessica Simpson.

The use of buff to mean “an enthusiast for something with a great knowledge of the topic” (eg Ferrari buff (a very devoted crew); film buff (an obsessive lot who take things very seriously); Lindsay Lohan buff (a calling for some)) was related to the color.  Since the 1820s New York City’s volunteer fire-fighters since had been issued buff-colored protective clothing and their image of daring with more than a whiff of danger in the 1890s attracted a following among young men who cherish ambitions to be firemen some day.  This manifested them rushing to the sites of fires at any time of the day or night, just so they could watch the firemen at work, fighting the fire.  There is something about fire which attracts some and in Australia, where bush firs have always been a feature of the hot, dry seasons, there have been cases of volunteer fire-fighters starting fires, apparently just so they can experience the thrill of extinguishing them; fire being fire, sometimes things end very badly.  As early as 1903 the New York Sun was referring to these enthusiasts (had it been later they might have been called “fire groupies”) as “the buffs” and from this use cam the idea of a “buff” being someone devoted to anything although there’s now more often the implication of “great knowledge of the topic).  In the UK military (mostly in plural) a “Buff” was a member of the Buffs (Royal East Kent Regiment (1572-1961)) and in numismatic slang, a “buff” was a clipping of Buffalo nickel (a copper–nickel five-cent piece struck by the US Mint 1913-1938.).  In UK slang, Buff also meant “a member of the Royal Antediluvian Order of Buffaloes” (which is sort of like the Freemasons but without the plotting and scheming”).  The finger food “Buffalo wings” made famous by the admirable Jessica Simpson (b 1980) gained the name because they were first served in 1964 at Frank & Teressa's Anchor Bar on Main Street, Buffalo.  Ms Simpson’s confusion about the dish (made with chicken wings) may have been caused by them often appearing on menus as “buffalo wings) with no initial capital.

The BUFF.

In USAF (US Air Force) slang, the Boeing B-52 Stratofortress (1952-1962 and still in service) is the BUFF (the acronym for Big ugly fat fellow or Big ugly fat fucker depending on who is asking).  From BUFF was derived the companion acronym for the LTV A-7 Corsair II (1965-1984, the last in active service retired in 2014) which was SLUFF (Short Little Ugly Fat Fellow or Short Little Ugly Fat Fucker).  In rail-transport, a “buff” describes the compressive coupler force that occurs during a slack bunched condition (and is related in that sense to “buffer” which is a physical barrier placed to halt the progress of a train to prevent damage to a structure).  In the slang of the dealers of street drugs, “buff” is any substance used to dilute drugs (by volume) in order to increase profits.  The noun “buffware” is not an IT term (although SysAdmins (system administrators) could probably think of a few products which should be so described); it describes pottery in a buff color. 

Highly qualified porn star Busty Buffy.

A “buffster” is someone who is “buffed” (lean, physically fit) and that use of the word emerged from gym culture during the 1980s, under the influence of buff in the sense of “polish to perfection”.  That influenced also the use of buff to mean “physically attractive; desirable” which began in MLE (Multicultural London English) before spreading to other linguistic tribes; the adverb buffly (in a buff manner; attractively or muscularly) can be used of a buffster (one who is fit and with good muscle definition).  In hospital slang, “to buff” means “to alter a medical chart, especially in a dishonest manner”, something which hints there may be something in Evelyn Waugh’s (1903-1966) warning that the greatest risk to one in hospital is “being murdered by the doctors”.  In the slang of graffiti writers (the term “graffiti artist” does now seem accepted by the art market) a “buff” is the act of remove a piece of graffiti by someone other than the creator.  Buffy is an adjective meaning “of or tending to a buff color” (the comparative buffier, the superlative buffiest) but it’s probably now most associated with the pop-culture character “Buffy the Vampire Slayer” (which seems to have made it a popular name also for porn stars).  Of the color, “buffish” is the alternative adjective.

The phrase “It’ll buff out” is a joke-line in the collector car market which references attempts to downplay the extent or significance of damage.

In 2005, Lindsay Lohan went for a drive in her Mercedes-Benz SL 65 AMG roadster.  It didn’t end well.  Based on the R230 (2001-2011) platform, the SL 65 AMG was produced between 2004-2012, all versions rated in excess of 600 horsepower, something perhaps not a wise choice for someone with no background handling such machinery though it could have been worse, the factory building 350 of the even more powerful SL 65 Black Series, the third occasion an SL was offered without a soft-top and the second time one had been configured with a permanent fixed-roof.

Classy Leather’s “Buffalo Hunter”.

Buffalo leather isn’t suitable for all purposes but it is greatly valued because of the combination of its thickness (compared to cow or goat leather or pig skin) and the unique and different grain patterns.  It’s the thickness which adds to the durability of buffalo leather but despite that it remains soft and flexible, making it an ideal material for premium leather goods such as leather bags, leather accessories, jackets etc.  The Classy Leather operation published an informative guide to buffalo leather and included technical information including what must have be a revelation to some: Although the terms “buffalo” and “bison” tend interchangeably to be used in North America, the leathers are quite distinct and what the industry calls “buffalo leather” usually means leather derived from the Asian Water Buffalo.  Buffalo leather comes from domestic buffalos (almost always Asian Water Buffalo) which mostly are raised for milk or meat; at the end of their productive life, the hides are used to make leather and a variety of processing methods are used, designed to suit the skin structure which has large pores.

1974 Suzuki GT750: The “Water Buffalo”.  The front twin disc setup was added in 1973 and was one of the first of its kind.

The Suzuki GT750 was produced between 1971-1977 and was an interesting example of the breed of large-capacity two-stroke motorcycles which provided much excitement and not a few fatalities but which fell victim to increasingly stringent emissions standards and the remarkable improvement in the performance, reliability and refinement of the multi-cylinder four-stroke machines.  One novelty was the GT750 was water-cooled, at the time rarely seen although that meant it missed out on one of Suzuki’s many imaginative acronyms: the RAC (ram air cooling) used on the smaller capacity models.  RAC was a simple aluminum scoop which sat atop the cylinder head and was designed to optimize air-flow.  It was the water-cooling of the GT750 which attracted nicknames but, a generation before the internet, the English language tended still to evolve with regional variations so in England it was “the Kettle”, in Australia “the Water Bottle” and in North America “the Water Buffalo”.  Foreign markets also went their own way, the French favoring “la bouillotte” (the hot water bottle) and the West Germans “Wasserbüffel” (water buffalo).  Suzuki called those sold in North America the "Le Mans" while RoW (rest of the world) models were simply the "GT750".

Ghost

Ghost (pronounced gohst)

(1) The soul of a dead person, a disembodied spirit imagined, usually as a vague, shadowy or evanescent form, as wandering among or haunting living persons.

(2) A mere shadow or semblance; a trace; a remote possibility; a faint trace or possibility of something.

(3) A spiritual being; the principle of life; soul; spirit (sometimes initial capital letter).

(4) A secondary image, especially one appearing on a television screen as a white shadow, caused by poor or double reception or by a defect in the receiver (also called ghosting).

(5) In photography, a faint secondary or out-of-focus image in a photographic print or negative resulting from reflections within the camera lens (also called ghost image).

(6) In optics, a series of false spectral lines produced by a diffraction grating with unevenly spaced lines.

(7) In metalworking, a streak appearing on a freshly machined piece of steel containing impurities.

(8) In pathology, a red blood cell having no hemoglobin.

(9) In tax-avoidance and other frauds, a fictitious employee, business etc, fabricated especially for the purpose of manipulating funds.

(10) In literature (and especially quasi-literature), as ghost-write, to write a book, speech etc for another often without attribution.

(11) In engraving, to lighten the background of a photograph before engraving.

(12) In informal use (often associated with social media), suddenly to end all contact with a person without explanation, especially a romantic relationship; to leave a social event or gathering suddenly without saying goodbye.

(13) In digital technology, to remove comments, threads, or other digital content from a website or online forum without informing the poster, keeping them hidden from the public but still visible to the poster.

(14) In bibliography, as ghost edition, an entry recorded in a bibliography of which no actual proof exists.

Pre 900: From the Middle English gost, gast & goost (breath; good or bad spirit, angel, demon; person, man, human being", in Biblical use "soul, spirit, life”), from the Old English gāst (breath, soul, spirit, ghost, being), related to the Old High German gaist & geist (spirit) and the Sanskrit hēda (fury, anger).  The Proto-West Germanic gaist was derived from the Proto-Germanic gaistaz (ghost, spirit, (source also of the Old Saxon gest, the Old Frisian jest, the Middle Dutch gheest, the Dutch geest & the German Geist (spirit, ghost))), from the primitive Indo-European ǵhéysd-os, from ǵhéysd- (anger, agitation) and was cognate with the Scots ghaist (ghost), the Saterland Frisian Gäist (spirit), the West Frisian geast (spirit), the Dutch geest (spirit, mind, ghost), the German Geist (spirit, mind, intellect), the Swedish gast (ghost), the Sanskrit हेड (héḍa), (anger, hatred) and the Persian زشت‎ (zešt) (ugly, hateful, disgusting).  There’s no documentary evidence but the ultimate root is conjectured to be the primitive Indo-European gheis-, used in forming words involving the notions of excitement, amazement, or fear (source also of Sanskrit hedah (wrath), the Avestan zaesha- (horrible, frightful), the Gothic usgaisjan and the Old English gæstan (to frighten).  Ghost is a noun & verb (and used imaginatively as an adjective), ghoster is a noun, ghostly & ghosty are adjectives, ghosting is a noun & verb and ghosted is a verb & adjective; the noun plural is ghosts.

Ghost is the English representative of West Germanic words for "supernatural being" and in Christian writings in Old English it was used to render the Latin spiritus, a sense preserved by the early translators of the Bible in “Holy Ghost”.  The sense of a "disembodied spirit of a dead person", especially imagined as wandering among the living or haunting them, is attested from the late fourteenth century, a meaning-shift which returned the word to what was its probable prehistoric sense.  Most Indo-European words for "soul or spirit" also double with reference to supernatural spirits.  Many have also a base sense of "appearance" (the Greek phantasma; the French spectre; the Polish widmo, from Old Church Slavonic videti (to see), the Old English scin, the Old High German giskin (originally "appearance, apparition”), related to the Old English scinan & the Old High German skinan (to shine)).  Other concepts exist, including the French revenant (literally "returning" (from the other world)), the Old Norse aptr-ganga, (literally "back-comer") & the Breton bugelnoz (literally "night-child”).  The Latin manes (spirits of the dead) was probably a euphemism.

The gh- spelling appeared early in the fifteenth century in Caxton, influenced by Flemish and Middle Dutch gheest, but was rare in English before mid-1500s.  The sense of a "slight suggestion, mere shadow or semblance" (as in ghost image, ghost of a chance etc) is noted from the 1610s; the sense of "one who secretly does work for another" is from 1884 and ghost-write was a 1922 back-formation from the earlier (1919) ghost-writing.  The American Indian ghost dance was first noted in 1890, ghost town is from 1908, ghost story dates from 1811, the now extinct ghost-word (apparent word or false form in a manuscript due to a blunder) is from 1886.  The “ghost in the machine” was English philosopher Gilbert Ryle's (1900-1976) 1949 description of René Descartes' (1596-1650) mind-body dualism and the phrase "to give up the ghost" (to die or prepare to die) was well-known in Old English.  Synonyms include phantom, devil, demon, soul, shadow, spectre, vision, vampire, apparition, revenant, appearance, haunt, visitor, shade, spook, poltergeist, phantasm, wraith, daemon & manes.  There are a surprising number of uses of ghost, ghosted, ghosting etc said to be associated modern or internet slang covering fields as diverse as linguistic techniques and the art & science of smoking weed.  However, the most commonly used describes someone with whom one has been in contact suddenly stops responding, disappearing, as it were, like a ghost.  This can happen in conjunction with unfriending etc but can be an act in isolation.

One day, there may be Lindsay Lohan: The autobiography.

Ghostwriters (also as ghost-writer) are professional writers hired to create content (books, columns, posts or any other text-focused item), the authorship of which will ultimately will be credited to another.  Ghostwriters are used for a number of reasons including constraints of time, a lack of interest in the project (though not the profits) or, typically, a lack of the necessary skill with the written word.  Ghostwriting contracts can vary but focus on including terms of payment, non-disclosure of involvement, the notional author’s exercise of veto over all or some of the content and the rights to the finished work.  Donald Trump (b 1946; US president 2017-2021) is known to have used ghostwriters on several occasions and the arrangements are not always concealed, Paris Hilton (b 1981) in her 2023 memoir's acknowledgments thanking the ghostwriter who “helped me find my voice”.  Mr Trump made no mention of his ghostwriters.    

Holy Ghost vs Holy Spirit in Blblical Translation

Pentecostés (Descent of the Holy Spirit) (circa 1545), oil on canvas by Tiziano Vecelli (or Vecellio), (circa 1489-1576; known in English as Titian), basalica of Santa Maria della Salute, Venice.

The Trinity is one of Christianity’s central doctrines, the unity of Father, Son, and Holy Spirit as three persons in the one Godhead.  One of the most important Christian affirmations about God, it’s rooted in the idea God came to meet Christians in a threefold figure: (1) as Creator, Lord of the history of salvation, Father, and Judge, as revealed in the Old Testament; (2) as the Lord who, in the incarnated figure of Jesus Christ, lived among human beings and was present in their midst as the “Resurrected One”; and (3) as the Holy Spirit, whom they experienced as the helper or intercessor in the power of the new life.  In the Roman Catholic Church, the Sign of the Cross is made in the name of the Father and of the Son and of the Holy Spirit.

It’s a myth that prior to the Second Vatican Council (Vatican II; 1962-1965), the Third Person of the Trinity was always referred to in English as the Holy Ghost and one of the council’s decisions was to replace this with Holy Spirit.  Although it’s true Pope Pius XII (1876–1958, pope 1939-1958) authorized several bilingual rites which included Holy Spirit, this was merely procedural and a formalization of processes for the publishing of new editions of existing works. Well before the twentieth century, the shift to Holy Spirit had become almost universal in translation although use of the older form persisted because of the reverence for tradition among some congregations (if not always the clergy) and a fondness, particularly in the Anglican community, for earlier translations, especially the Book of Common Prayer (1549-1622) and the King James version of the Bible (KJV: 1611).

The change reflects the evolution of words. In the theological context, Holy Ghost and Holy Spirit mean exactly the same thing.  The early translators were influenced by ghost being of Germanic origin and, as the Old English gast inherited the original meaning “soul, life, breath, good or bad spirit, angel or demon”, they used gast to translate the Latin Spiritus, thus Holy Ghost.  Although the more modern sense of a disembodied dead person dates from the late fourteenth century, it long remained rare and when translating the Bible into English the scholars behind the KJV opted mostly to use Holy Ghost which enjoys ninety entries compared with seven for Holy Spirit.  Either as literature or theology, there’s nothing in the texts to suggest any difference of meaning between the two, the conclusion of biblical scholars being the choices were wholly arbitrary and probably an unintentional consequence of the KJV being translated from the Greek into English by different committees.  One committee translated hagion pneuma as Holy Spirit while the other preferred Holy Ghost and when the work of the two bodies was combined, the differences remained.  In English, the meaning shift of ghost was induced essentially by its adoption in literature and popular culture, the sense long universally understood to be that of the spectre of a deceased person or a demonic apparition, hardly an association the church found helpful.  It hasn’t wholly been replaced however, some editions of the Book of Common Prayer still are printed with the phrase “He may receive the benefits of absolution, together with ghostly counsel and advice, to the quieting of his conscience.”

Unrelated to etymological matters however, there is one fine theological point about the Trinity.  It took some time for the Patristic Fathers (the early Christian writers of the period generally considered to run from the end of New Testament times or end of the Apostolic Age (circa 100 AD) to either the Council of Chalcedon (451 AD) or the Second Council of Nicaea (787 AD)) to work out the Trinity was three persons, but one God.  The Old Testament foretold the visit to earthly life of the Messiah, but did not name him explicitly as Jesus, seeing the Holy Spirit as a manifestation of God, but did not see Him as a separate person of the one Godhead.  Despite the implications of that, at least since Augustine (354–430), it’s never been an orthodox view the Old Testament should be thought incomplete.  Benedict XVI (1927–2022; pope 2005-2013, pope emeritus 2013-2022), always one to find a fine theological point, noted “Christians do not read the Old Testament for its own sake but always with Christ and through Christ, as a voyage to Truth through continuing Revelation.”

A century apart: Rolls-Royce Silver Ghost (left) and Paris Hilton's Rolls-Royce Ghost (Right).

The Rolls-Royce Silver Ghost (1906-1926) was the car which cemented the company's reputation and sometime during its production, it may well have deserved to be regarded "the best car in the world", at term which long ago ceased to be useful but Rolls-Royce have probably always deserved to be thought "the best-made cars in the world".  Some might have matched the quality of the fit and finish but it's doubtful any have ever done it better and such was the reputation the Silver Ghost quickly gained that the name overtook the line.  Originally, the Silver Ghost had been but one model in a range available on their standard (40/50 hp) chassis but the name so captured the public imagination that eventually, the factory relented and when the first of the Phantom line was release in 1926, Silver Ghost for all the 40/50 cars it became.  Perhaps surprisingly, although in the subsequent century there were many uses of the "silver" adjective (Silver Wraith, Silver Dawn, Silver Cloud, Silver Shadow, Silver Spirit, Silver Spur & Silver Seraph), it wasn't until 2009 the "Ghost" name was revived and it remains in production still, the line augmented in 2011 by the Ghost Extended Wheelbase (EWB).

RAF Rolls-Royce Silver Ghost armored car, Iraq, circa 1936.

The Silver Ghost also had what may seem an improbable career as a military vehicle, the factory eventually building 120 armored cars on the chassis which was famously robust because of the need to survive on the often rough roads throughout the British Empire.  Although the period of intended service on the Western Front was shortened when the war of movement anticipated upon the outbreak of hostilities soon gave way to the effectively static trench warfare, the machines proved ideally suited to operations in the Middle East, the most famous the squadron used by TE Lawrence (Lawrence of Arabia; 1888–1935) in battles against the Ottoman forces during World War I (1914-1918).  Lawrence remarked the Rolls-Royces were “more valuable than rubies” in desert combat and that he’d be content with one for the rest of his life were it to be supplied with tyres and petrol, the big, heavy Ghosts chewing rapidly through both.  In many parts of the empire, numbers of the armoured cars remained in service well into the 1930s, valued especially by the Raj in India.  The last one was retired from service with the Irish Free State in 1944, new tyres being unobtainable.

Propeller

Propeller (pronounced pruh-pel-er)

(1) A person or thing that propels.

(2) A device with a hub to which are attached evenly spaced & shaped radiating blades, rotating on a shaft to pitch against air or water to propel an aircraft, ship etc.

(3) A wind-driven (usually three-bladed) device that provides mechanical energy, as for driving an electric alternator in wind plants (not a universal use).

(4) A steamboat thus propelled; a screw steamer (now rare).

(5) In fishing, a spinnerbait.

1780: The construct was propel + -er and the original sense was “one who or that which that propels”, an agent noun from the verb propel.  The verb propel was a mid-fifteenth century form from the Middle English propellen (to drive away, expel), from the Latin propellere (push forward, drive forward, drive forth; move, impel), the construct being pro- (the prefix here use in the sense of “forward direction, forward movement”) + pellere (to push, drive), from the primitive Indo-European root pel- (to thrust, strike, drive).  The meaning “to drive onward, cause to move forward” emerged in the 1650s.  The –er suffix was from the Middle English –er & -ere, from the Old English -ere, from the Proto-Germanic -ārijaz, thought most likely to have been borrowed from the Latin –ārius where, as a suffix, it was used to form adjectives from nouns or numerals.  In English, the –er suffix, when added to a verb, created an agent noun: the person or thing that doing the action indicated by the root verb.   The use in English was reinforced by the synonymous but unrelated Old French –or & -eor (the Anglo-Norman variant -our), from the Latin -ātor & -tor, from the primitive Indo-European -tōr.  When appended to a noun, it created the noun denoting an occupation or describing the person whose occupation is the noun.  The alternative spelling propellor dates from the early days of aviation in the first years of the twentieth century and is now extinct.  The standard abbreviation is “prop”, the use noted from military aviation since 1914.  Propeller is a noun; the noun plural is propellers.

Although the concept was used in antiquity and inventors and others (most famously Leonardo da Vinci (1452–1519))  had for centuries experimented, the use of the word in mechanical engineering dates from 1809 and was from nautical design describing the application of a “device for moving vessels on or under the water”.  In aircraft design the theory of the use of “propeller” appears in papers and drawings in the 1840s (in what were then described as “flying machines”) and models were built which demonstrated a “proof of concept” although it would be decades before lightweight engines of sufficient power existed to allow experiments in aerodynamics and construction to be powered.  The first known rendering of an aircraft propeller in a recognizably modern form dates from 1853.  The modern propeller uses two or (usually) more twisted, airfoil-shaped blades mounted around a shaft which are spun to provide propulsion of a vehicle through water or air, or to cause fluid flow, as in a pump.  The lift generated by the spinning blades provides the force that propels the vehicle or the fluid although this lift does not of necessity have to induce an actual upward force; its direction is simply parallel to the rotating shaft.

Lindsay Lohan getting off the propeller driven (technically a turbo-prop) NAPA Shuttle, The Parent Trap (1998).

The term “to disembark” was borrowed from nautical use and of late "to deplane" has entered English which seems unnecessary but the companion “to disemplane” seems more absurd still; real people continue to “get on” and “get off” aircraft.

The terms “impeller” & “propeller” both describe devices which use various implantations of the “rotating blade(s) design and are used in mechanical systems to take advantage of the properties of fluid dynamics to harness specific energy for some purpose.  A propeller is a type of rotating device with blades designed to propel or move a fluid (typically a gas or a liquid) by generating thrust; they are most associated with marine vessels, aircraft and some industrial applications.  In aircraft, propellers can be attached to wing-mounted engines or mounted just about anywhere on a fuselage although historically a location at the front has been most common.  In marine applications, propellers have on specialized vessels been located to the sides of the hull but they almost always emerge at or close to the stern.  An impeller is a rotating component with blades or vanes (almost always enclosed in a housing), typically used for fluid or air distribution, such as a pump or a compressor, the primary purpose being to increase flow or pressure.  The classic impellers those in centrifugal pumps where they spin, creating a flow of fluid (liquid or air) by imparting centrifugal force to the substance; in practice, impellers such accelerate liquids are more common.

So an impeller & propeller do much the same thing, using blades to propel some form of fluid.  The use of different terms is helpful because in practice they are very different devices and the distinction that one is external and the other located within a housing is handy and the origin of that seems to lie in the construct of impeller which came first, dating from circa 1680 (as an agent noun from the verb impel) in the sense of “someone or something which impels”.  What the design of an impeller does is use the energy from the rotation to increase the flow or pressure of the fluid and it that it’s the reverse of a turbine, the rotation of which extracts energy from, and reduces the pressure of the flow.  Engineers also have a number of highly technical rules about what is and is not defined as an impeller base on the whether the entry and exit of the fluids occur axially or radially but it seemed impossible to construct such definitions as absolutes so for most the simpler distinctions are more helpful.  In engineering, impellers have been recorded as a machine or component name since 1836.

News Corp website 22 January 2024.  To refer to a jet engine’s nacelle as a propeller could (almost) be defended on the basis it’s the jet engine which “propels” the aircraft but this is more likely an example of (1) the decline in the quality of journalists and (2) what happens when there are no sub-editors to correct the mistakes.  In time, artificial intelligence (AI) should improve things.    

The verb impel dates from the early fifteenth century and was from the Middle English impellen, from the Latin impellere (to push, strike against; set in motion, drive forward, urge on), the construct an assimilated form of in- (into, in, on, upon), from the primitive Indo-European root en- (in) + pellere (to push, drive), from the primitive Indo-European root pel- (to thrust, strike, drive).  The construct of the Latin impellō was in- +‎ pellō (push, drive), from the Proto-Italic pelnō or pelnaō, a nasal-infix present derived from the primitive Indo-European pelh- (to drive, strike, thrust).  The Latin prefix –in could be appended to create a negative (un-, non-, not etc) but here was used as an intensifier, another possible meaning (in, within, inside) coincidental to the mechanical devices being usually mounted within housings.

Propellers and impellers both use blades (although those of the latter are often in the form of a single piece wither cast, molded, or (occasionally) forged.  Turbines also use blade-like parts but these are called vanes and an industry which seems unable to decide on terminology is the burgeoning business of wind-power; the huge rotating assemblies on wind turbines are referred to variously as vanes, blades or rotors.  Rotor blades are familiar for the use in helicopters which is essentially an airframe where a large-scale propeller sits atop the structure, pointing upwards and rather than “propeller blades”, the accepted term is “rotor blades”, the design of which permits both lift and directional thrust although some exotic multi-engined machines have rotors in housings which, to maximize performance, can themselves be rotated to operate as conventional propellers.

Supermarine Seafang (1946) with contra-rotating propellers.  The Seafang was powered by the Rolls-Royce Griffon and was the final evolution of the Spitfire-derived Seafire and Spiteful, the trio all designed for use on Royal Navy aircraft carriers, the series enjoying success despite the basic design being hampered by the narrow undercarriage which made landings a challenge (something corrected on the Spiteful & Seafang).  Series production of the Seafang was contemplated but eventually only 18 were built because the jet-powered de Havilland Sea Vampire proved capable of carrier operations, surprising some at the Admiralty who doubted the jets could operate from anywhere but land.

The evolution of aircraft influenced propellers.  Once they had been fashioned from wood before the need for faster, more efficient shapes dictated the use of aluminium or other light metals.  By the time the first modern monoplane fighters appeared in the mid 1930s propellers were still two-bladed but as power increased over the years (something which accelerated during World War II (1939-1945)), three, four and five-bladed solutions were engineered.  The rising output however, although it permitted higher performance, created challenges for engineers, notably the “torque effect” which meant a tendency to cause the aircraft to roll in the direction of the propeller’s spin, a problem especially serious during take-offs.  In twin-engined aircraft the solution was to have the propellers rotate in opposite directions but in airframes with a single power-plant, sometimes used were contra-rotating propellers which, although introducing additional complexity and demanding additional maintenance, did offer advantages including: (1) harnessing more of an engine’s power, (2) increased thrust efficiency by a reduction in energy losses, (3) counteracting the torque effect, (4) improved low-speed manoeuvrability and ground-handling and (5) improved acceleration and climbing performance.

A flight of Republic P-47D Thunderbolts with under-wing drop-tanks.

The propeller also influenced other aspects of the aircraft.  When the prototype Republic P-47 Thunderbolt (1941-1945) first took to the air, it was the largest, heaviest single-seat piston-engined fighter ever produced (a distinction it still enjoys today).  Even the early versions used an engine rated at 2000 horsepower (later this would rise to 2800) and to harness this output demanded a large propeller.  The 12 foot (3.7 m) diameter of this four-bladed monster meant the landing-gear had to be extraordinarily long and the only way it could be accommodated was to have them retract inward, otherwise the heavy wing armament (8 x .50 inch (12.7 mm) M2 Browning machine guns (425 rounds per gun)) wouldn’t have fitted.

Chrysler XI-2220 V16.  The splined shaft is where the propeller attaches.

With things like the Thunderbolt, the Hawker Tempest and the later Supermarine Spitfires (and its derivatives), the piston-engined fighter achieved its final evolutionary form, the jet engine offering a path to performance unattainable while the physics of propellers imposed limits.  However, had the use of the A-Bombs not ended the war in 1945, development of the propeller aircraft would have continued because the early jets lacked thrust and reliability as well as suffering a rate of fuel consumption which rendered them unsuitable for long-distance operations.  With the war against Japan envisaged as lasting well into 1946, development of faster, more powerful piston engines continued although, given the parlous state of the Japanese military, it’s dubious at least there was much of a rationale for this but the military industrial complex is a creature of inertia and Chrysler’s research had perfected a new aero-engine for the Thunderbolt.  The XI-2220 was a 2,220 cubic inch (36.4 litre) V16 which was rated at a basic 2450 horsepower with some 4000 hp available when tuned for wartime use but with the end of the conflict, all such developments were cancelled and attention switched to the brave new world of jets and swept wings.  Thus ended the era of the big propeller-driven fighters, the V16 stillborn, as was the other extraordinary aero-engine on the drawing board: Britain's 32-cylinder Napier-Sabre H-32 which was a scaled-up version of their H24.

Exsanguinate

Exsanguinate (pronounced eks-sang-gwuh-neyt)

(1) To kill by means of blood loss.

(2) To die by means of blood loss.

(3) To drain a body (living or dead) of blood.

1610–1620: From the Late Latin exsanguinātus (bloodless, deprived of blood), past participle of exsanguināre, the construct being ex- (out) + sanguinem, from sanguis (blood).  The construct in English was ex- + sanguine, + -ate.  The ex- prefix was from the Middle English, from words borrowed from the Middle French, from the Latin ex (out of, from), from the primitive Indo-European eǵ- & eǵs- (out).  It was cognate with the Ancient Greek ἐξ (ex) (out of, from), the Transalpine Gaulish ex- (out), the Old Irish ess- (out), the Old Church Slavonic изъ (izŭ) (out) & the Russian из (iz) (from, out of).  The “x” in “ex-“, sometimes is elided before certain constants, reduced to e- (eg ejaculate).  Sanguine was from the Middle English sanguine, from the Old French sanguin, from the Latin sanguineus (of blood), from sanguis.  The Latin sanquis, perhaps surprisingly, is of uncertain origin but may be from the primitive Indo-European hsh-én- from hésh₂r̥ (blood).  The suffix -ate was a word-forming element used in forming nouns from Latin words ending in -ātus, -āta, & -ātum (such as estate, primate & senate).  Those that came to English via French often began with -at, but an -e was added in the fifteenth century or later to indicate the long vowel.  It can also mark adjectives formed from Latin perfect passive participle suffixes of first conjugation verbs -ātus, -āta, & -ātum (such as desolate, moderate & separate).  Again, often they were adopted in Middle English with an –at suffix, the -e appended after circa 1400; a doublet of –ee.  Exsanguinate & exsanguinating are verbs, exsanguinated is a verb & adjective, exsanguination is a noun; the noun plural is exsanguinations.

As an adjective, exsanguine (bloodless) is attested from the mid-seventeenth century in both literal and figurative use and is now probably a technical word used only by embalmers, in clinical pathology, in the veterinary sciences or in slaughterhouses.  The word being a bit cumbersome, use never extended to kitchens, despite much exsanguination historically being part of the workings of production kitchens (before modern supply chains); where required, chefs prefer the punchier “drain”.  In use the verb is intransitive in the sense of “to die by means of blood loss” and transitive in the sense of “to kill by means of blood loss” or “to drain a body (living or dead) of blood”.

Gory: Lindsay Lohan was photographed in 2011 & 2013 by Tyler Shields (b 1982) in sessions which involved knives and the depiction of blood.  The shoot attracted some attention and while the technical achievement was noted, it being quite challenging to work with blood (fake or real) and realize something realistic but it was also criticized as adding little to the discussion about the pornography of violence against women.  There was a time when such photographs would has shocked but that moment has long passed and the most thoughtful comments on the photographs were that while it's a necessary discussion, it's one that should be conducted with words and such staged images do nothing but add to cultural desensitization.

Technical notes on the process of stunning & exsanguination in a slaughterhouse.  Department of Animal Biosciences, University of Guelph, Ontario, Canada.

(1) Stunning process

Criteria for a good slaughter method:

(1) Animals must not be treated cruelly or unnecessarily stressed.

(2) Exsanguination must be as rapid and as complete as possible.

(3) Damage to the carcass must be minimal, and the method of slaughter must be hygienic, economical and safe for abattoir workers.

To avoid the risk of cruelty, animals must be stunned or rendered unconscious before exsanguination.  When religious reasons do not allow stunning, extra care is needed to ensure exsanguination causes the minimum of distress to the animal.  In the Kosher method of killing, conscious cattle are suspended with the head stretched back, and then the throat and its major blood vessels are severed. Drugs cannot be used in the meat industry to induce unconsciousness in animals for slaughter because unacceptable residues would remain in the meat.

Animals can be effectively stunned by concussion which may be induced by a bullet or a bolt that penetrates the cranium or by the impact of a fast-moving knocker on the surface of the cranium.  In modern abattoirs, the primitive pole-axe has been replaced by devices which use expanding gas, either from an air-compressor or a blank ammunition cartridge. First, the animal is restrained in a narrow pen or knocking box in order to minimize its head movements, then the concussion instrument is then accurately located at a point on the midline of the skull, above the level of the brow ridges of the eye sockets.  Concussion stunning should not be applied on the neck or posterior part of the skull.

The knocker is a heavy instrument held with both hands.  There is a safety catch on the handle, but the actual trigger protrudes from the head of the knocker and is activated as the knocker is tapped against the animal's head.  The captive bolt pistol resembles a heavy hand gun but a blank cartridge rather than a bullet is used to propel a cylindrical bolt into the skull.  After penetration, the bolt is withdrawn into the barrel of the pistol and the pistol is reloaded.  Steers, heifers and cows are normally stunned with a knocker or a heavy captive bolt pistol, but bulls and boars which have massive skulls are sometimes shot with a rifle bullet. Pigs and lambs may be stunned with a light-weight captive bolt pistol.

Thirsty work.  A vampire exsanguinates.

(2) Exsanguination process

Cattle and pigs are usually exsanguinated by a puncture wound which opens the major blood vessels at the base of the neck, not far from the heart (the trade name for this process is sticking).  In sheep, lambs and small calves, the major blood vessels may be severed by a transverse cut across the throat, near to the head.  Poultry can be exsanguinated with a diagonal cut from the corner of the jaw towards the ear on the other side, or by a knife thrust through the roof of the mouth to severe the brain and its major blood vessels. For poultry, the cut may be made on the side of the head if the head is later to be removed automatically by machine.

If the sticking wound is inaccurately placed, exsanguination may be too slow, and it may be almost halted by the formation of large blood clots.  The formation of blood clots is accelerated when large areas of tissue are damaged by repeated inaccurate punctures.  If the trachea is severed by the sticking wound, blood may be drawn into the lungs as the animal breathes. Later in the slaughter procedure, this may necessitate the trimming of blood clots from the pleural membranes after they have been inspected.  If the oesophagus is severed, the vascular system may be contaminated by the entry of food particles into the venous system. If the connective tissues of the shoulder are opened, blood may seep into the shoulder region to form blood clots between the muscles.

Incomplete exsanguination increases the amount of residual blood in the carcass.  The lean meat may then appear unduly dark and the fat may become streaked with blood. On the surface of incompletely exsanguinated poultry, the skin may appear dark and bloody over the breast, neck, shoulders and wings. The microscopic tissue damage that may later be caused by the freezing and thawing of poultry enables residual blood to leak from skin capillaries.  Thus, the results of incomplete exsanguination are often more noticeable to the consumer than to the producer.

The exsanguination or sticking of meat animals in an abattoir is usually performed by severing the carotid arteries and the jugular vein at the base of the neck.  In poultry, these vessels may be cut only on one side of the neck. The sticking knife must be kept clean otherwise bacteria might be introduced into the venous system and spread through the otherwise relatively sterile muscles of the carcass.  Once exsanguination has started, the pulse and mean blood pressure decline rapidly because of the reduced stroke volume of the heart. Blood pressure changes are monitored physiologically by baroreceptors in the carotid sinuses. During exsanguination, respiratory movements of the thorax may be stimulated, and neurogenic and hormonal mechanisms attempt to restore the blood pressure by increasing the peripheral resistance by vasoconstriction.  The heart keeps beating for some time after the major blood vessels are emptied, but stops rapidly if exposed and cooled.  Electrical stunning of pigs may terminate cardiac activity so that, at the start of exsanguination, the blood escapes by gravity rather than being pumped out.  In pigs, cardiac arrest does not affect the rate and extent of exsanguination.  After exsanguination has started, the heart usually re-starts and attempts to pump, until it runs out of energy. Thus, in many cases, there is no reason why animals such as pigs and sheep cannot be killed by electrocution rather than being merely electrically stunned.  In cattle stunned by concussion, more or less complete exsanguination may be obtained without ventricular pumping. Similarly, normal exsanguination is obtained in poultry that have been killed by electrocution rather than by being electrically stunned. In meat animals, "head to back" stunning may be used to stop the heart.

Blood loss as a percentage of body weight differs between species: cows, 4.2 to 5.7%; calves, 4.4 to 6.7%; sheep, 4.4 to 7.6%; and pigs, 1.5 to 5.8%.  Blood content as a percentage of live weight may decrease in heavier animals since the growth of blood volume does not keep pace with growth of live weight. Approximately 60% of blood is lost at sticking, 20-25% remains in the viscera, while a maximum of 10% may remain in carcass muscles. Different stunning methods may modify the physiological conditions at the start of exsanguination and, also, the neural responses to exsanguination.  Electrically stunned sheep lose more blood than those stunned with a captive bolt, but they also have more blood splashes in their carcasses.

Reduction of blood flow to the kidneys causes the release of a proteolytic enzyme, renin, which acts on a plasma protein to produce a polypeptide, angiotensin I.  This polypeptide is converted enzymatically to angiotensin II which then causes widespread vasoconstriction. Vasoconstriction is important because it decreases the retention of blood in meat. Angiotensin II vasoconstriction is operative in both conscious and anaesthetized animals.  Catecholamines and antidiuretic hormone (ADH) may also enhance vasoconstriction during exsanguination.  Speed of exsanguination may modify the balance between neural and hormonal vasoconstrictive mechanisms, with hormonal vasoconstriction predominating in rapid exsanguination.  However, asphyxia prior to exsanguination may result in vasoconstriction due to the activity of the sympathetic nervous system.

Traditionally it has been maintained that poor bleeding leads to dark meat with poor keeping qualities due to microbial spoilage and rancidity but there is little scientific evidence in support of this view and it may be false, even in animals which retain massive amounts of blood in their carcasses.  Delayed exsanguination of cattle may lead to a slight reduction in the amount of blood removed so that the carcass and spleen are slightly heavier but the effects on meat quality are negligible. It is not suggested poor exsanguination is a good thing, but should it occur, it is not the disaster some meat inspectors suppose.