Nipple

Nipple (pronounced nip-uhl)

(1) In anatomy, the small, conical projection near the center of the areola of each mammary gland (breast); also called mamilla, papilla or teat.  In females, the nipple contains the outlets of the milk ducts.

(2) Something resembling (often in scaled-up form) a female’s nipple, as the mouthpiece of a nursing bottle or pacifier (in some places an informal word for a pacifier).

(3) Any device resembling a nipple in shape or function.

(4) A mechanical device through which liquids or gases can be passed in a regulated manner; as grease nipple a small drilled bush, usually screwed into a bearing (or other component needing periodic replenishment of a greasing agent) through which grease is introduced.

(5) In plumbing & gas-fitting, a short piece of pipe with threads on each end, used for joining valves.

(6) Any small physical protrusion on an automotive or machine part or any other part that fits into a groove on another part (now rare).

(7) In computer (hardware) slang, the pointing device in the centre of the keyboard of certain laptops, partially fulfilling the functionality of a mouse, trackball or track-pad (although some (male) users insist it is called “the clit”).

(8) In pre-modern ballistics, a perforated segment that fits into part of the breech of a muzzle-loading gun, on which the percussion cap is fixed.

(9) In the design of bicycles, an internally threaded piece which holds a bicycle spoke in place on the rim.

(10) To fit (a baby's bottle etc) with a nipple (archaic).

(11) To give one's nipple to (a baby) to allow breastfeeding (archaic).

1520–1530: From the Middle English nipple, from the earlier neble, nibble, nible & nepil (all of which may be derived from nib & neb (tip; point).  The Old English nypel (elephant’s trunk) was formed analogously as “a protuberance from one's neb”.  The late twelfth century pap & pappe (nipple of a woman's breast) was first attested in Northern and Midlands writing, probably from a Scandinavian source (there’s no record in the Old Norse but there was the dialectal Swedish pappe), from the primitive Indo-European imitative root pap- (to swell), the source also of the Latin papilla (nipple) which may have influenced the English papula (a swelling, pimple) and the Lithuanian papas (nipple).  The spellings neple, nypil, nyppell, neapel, neaple, neble and all obsolete.  Nipple is a noun & verb, nippling is a verb and nippleless & nippled are adjectives; the noun plural is nipples.

One extinct verb which, perhaps surprisingly, wasn’t revived even after it became apparent trends of use on the internet suggested it might be helpful, was expapillate (bare the breasts to the nipples), identified by the outstandingly good Online Etymology Dictionary as an entry in an early English "dictionary", published in eleven editions between 1623 and the 1650s.  The book was neither a prescriptive or descriptive work encompassing the whole language but was described as “An Interpreter of Hard English Words”, an approach others later took including Wilfred Funk (1883–1965) in his Word Origins and Their Romantic Stories (1950), the idea being to focus on the less known or more obscure.  The construct of expapillate was ex- + papillate.  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).  The Latin papillate was the vocative masculine singular of papillātus (having nipples or buds; shaped like a nipple or bud) and was used in English as a transitive verb (to cover with papillae) and intransitive verb (to take the form of a papilla, or of papillae).

Volkswagen Type 2 “splitties”: Early “flasher-free” version (1950-1960) which used semaphore signals (trafficators) (left), one from the 1955-1963 with “bullets” or “nipples” (centre) and a late-build one with “waffles” or “fisheyes”.   

The Volkswagen Type 2 (sometimes referred to generically as “Microbus” or “Kombi” although those were specific variants) played a role in post-war culture on both sides of the Atlantic and the most desirable of the classic, early “split screen” (1950–1967 (and built in Brazil 1953–1975)) models such as the 21 & 23 window “Sambas” have become a cult and in the bubble market which inflated in the immediate post-pandemic period, some restored examples sold at auction for over US$200,000.    The VW originality police are no less exacting than those who examine Ferraris, Jaguars or Corvettes and, clipboards in hand, will mark-down a vehicle presented for judging if a 1957 Kombi is presented with clamps from a 1959 Microbus having been used.  The details on the early Type 2s also have their own vocabulary one example being the front turn-indicators.  Except for some built for export (with small amber bulbs fitted within the headlight buckets), the early Type 2s did not have flashing indicators, relying on mechanical semaphore signals (better known as “trafficators”); these were phased out between 1955-1960.  That they remained in use until then was not unique to Volkswagen, in England, Rolls-Royce used them until 1959 and BMC (British Motor Corporation) fitted their last to the Morris Minor (1948-1971) in 1971 and interesting contrast with the East German Trabant (better remembered as the “Trabi” or “Trabbi”) that had amber units from its introduction.  The small, protruding, conical indicators first appeared in 1955 and are usually called “bullets” although, inevitably, the nickname “nipples” soon circulated.  The larger, flatter indicators were used from 1963 until production of the “split screen” Type 2s ended in 1967; they’re known as “waffles” or “fisheyes”.

In 1974, The British Medical Journal (BMJ) used the term "guitar nipple" to describe "the irritation to the breast that can occur from the pressure of the guitar against the body."  That was indicative of the trend in the English-speaking world for newly-identified (and sometimes novel) conditions to be constructed with English elements, rather than the Latin historically used.  In the same spirit, two years later a contributor to the JAMA (Journal of the American Medical Association) was more imaginative still, coining "hot pants syndrome" when documenting cases in which a burn to the skin had been induced by a patient carrying a battery-powered transistor radio in the pocket of their trousers.  There was also in 1978 the NEJM's (New England Journal of Medicine) "disco digit" which referred to "a sore or infected finger caused by too much finger snapping while dancing."    

Jaguar tool kit supplied with 1966 E-Type (XKE, 1961-1974).  The grease gun (left) was used to force grease into various components through grease nipples.  This wauntil recent decades a regular part of automobile maintenance and remains an essential part of the servicing schedules of heavy vehicles and machinery.

Until the 1970s, it was common for cars to need periodic “greasing” of certain components, a process which involved attaching a “grease gun” to a “grease nipple” which permanently was mounted on the relevant part; manually, the gun (usually a type of plunger) was used to force grease through the nipple.  This was undertaken either by owners, chauffeurs or mechanics at service stations who routinely would perform an “oil and grease” which included (all or some of): changing the engine, gearbox & differential oil, replacing the filter(s) and greasing all required grease points.  On more expensive vehicles, “one-shot lubrication” systems (known also as CLS (centralized lubrication systems) & ALS (automated lubrication systems)) were introduced during the 1920s, the technology adapted from the hardware used in aviation and marine engineering.  Although some attempts were made to create wholly automated systems, the most widely used were those which incorporated a foot pump for the driver to press at specified intervals; this action forced grease from a central reservoir to the required points.  Being a sealed system, this meant that nowhere in the system were grease nipples required (although some often still were included in components which demanded less frequent attention or were of a design which made their inclusion in the CLS plumbing too difficult.  ALS systems remain common in many places including heavy machinery, ships and the industrial plant used in factories, power plants etc.

The standard grease nipple used on the Jaguar E-Type (XKE) (left) and a diagram with a legend listing the E-Type's oil, brake fluid, transmission fluid and grease nipple locations.  The grease nipples are indicated by the obelus (†).  In automobiles, by the 1970s the need for multiple grease points or one-shot lubrication had begun to be eliminated (although some older designs maintained the legacy for decades) as advances in metallurgy and lubrication technology permitted the development of sealed, maintenance-free components which are “packed with grease" and thus “lubricated for life”.  However, for heavy-duty machines such as trucks and earth-moving equipment operating in adverse conditions, there are often still components demanding regular greasing and thus grease nipples are still a thing.

Also a thing is the “nipple orgasm”, at least for those for whom a nipple is a “hardwired erogenous zone” responsive to stimulation; that's a sub-set of the population and there are probably no reliable estimates of the prevalence.  Although in humans orgasms are typically thought an ejaculative, vaginal or clitoral phenomenon, sexologists list more than a dozen types, varying in instance or intensity based on the individual, the circumstances and sensitivity to stimulation.  When warming to the topic, these specialists will also discuss the details of “energetic orgasms” (which can, without physical touch, be triggered by meditation or fantasy) and “sleep orgasms”, said to have been experienced by an “estimated” 37% of women and 83% of men.  Quite how those numbers were obtained isn’t clear but helpfully, in 2011, New Jersey-based neuroscientist, psychotherapist & sex therapist Dr Nan Wise (b 1967) undertook a study to reveal how nipple stimulation affects the brain.  What Dr Wise wanted to build on was the existing understanding “…the clitoris, vagina and cervix are mapped on the genital sensory cortex”, something which sits between the brain’s two hemispheres and which she labels “hedonistic pleasure zone” or, more illustratively “the crotch of the brain”.

What Dr Wise did was have the study’s subjects stimulated with various mental fantasies while in an MRI (magnetic resonance imaging) machine, allowing her team to observe how distinct parts of the brain responded to various experiences.  The results were generally in line with expectations except that nipple stimulation proved an outlier.  While her hypothesis had been there would have been activity in the brain region associated with chest sensation (the theory being nipple orgasms might occur because stimulation of the organ releases oxytocin, a hormone that can cause uterine contractions, potentially leading to vaginal orgasm), instead it was found nipple stimulation activated the genital sensory cortex itself, leading Dr Wise to conclude: “The nipples are a hardwired erogenous zone, like the genitals, when nipples are stimulated, the brain gets activated, and regions processing the sensation communicate with those responsible for pleasure.”  This tied in with one of the accepted dictums in neuroscience: “neurons that fire together wire together” and the study’s findings do seem to suggest it is plausible there exists a neural pathway between the nipples and the genitals.  Sexologists however caution individual responses will vary and techniques which produce pleasing results for one will induce no response in others.  So, YMMV (your mileage many vary) and the sexologists recommend experimentation.

The SKIMS Nipple Bra

Wearing it well: Kim Kardashian in SKIMS "nipple bra"

The admirable (and much admired) Kim Kardashian (b 1980) in October 2023 announced the latest addition to her SKIMS product line: a bra with “built in” nipples, designed to be prominent enough obviously to protrude through clothing.  Said to offer the “ultimate shock factor” (although after the shocks of the last decade-odd, some of which those associated with Kardashian clan have instigated, that may be hyperbolic) the viewer response suggested many weren’t certain whether product was real or a gimmick designed to attract publicity.  It certainly attracted publicity but turned out to be real (with SKIMS part number).  Even if the concept wasn't as “innovative” as claimed, the promotional approach in the video certainly was, the spin being that if women can don a bra to emulate one of the more pleasing consequences of cold weather, the psychological effect might be they’ll be less inclined to turn on (or up) the air-conditioner, thus reducing energy use, thereby lowering carbon emissions, meaning a lesser contribution to the concentration of atmospheric CO₂ (and other greenhouse gasses) which causes accelerated climate change including higher temperatures.  That seems to be drawing a long bow but doubtlessly somewhere there will be published research which can be spun to support (or at least not disprove) each of the steps in the internal Kardashian logic.  It was certainly an example of the way commerce is attempting to monetize concerns about climate change.  

As Ms Kardashian put it: “The earth’s temperature is getting hotter and hotter. Sea levels are rising. The ice sheets are shrinking. I’m no scientist, but I believe everyone can do their skillset to do their part.  That’s why I’m introducing a brand-new bra with a built-in nipple so matter how hot it is, you’ll always look cold.  Some days are hard but these nipples are harder. And unlike the icebergs, these aren’t going anywhere.”  The bra was said to be available in six colors with a stated “10% of sales” (the exact math of that calculation not disclosed) to be a “one off donation” to 1% for the Planet (a multi-national collective of businesses pledged to gifting at least 1% of their annual revenue to “environmental causes”).  So it sounded like a real product with a real part-number (not then listed) but there were those who thought the release date being Halloween (October 31) might suggest it might not be wholly serious.  Even had it not been real, it would have been a good case-study for students of such things learning the craft of the promotional video clip, the only opportunity missed being Ms Kardashian should first have appeared in a scientist's white lab coat, peeling it off as she spoke the words "I'm no scientist".  The part-number's later appearance in the catalogue verified the availability.

Kylie Jenner (b 1997), Met Gala 2026, Metropolitan Museum of Art, New York City, May 2026.

Keeping it in the family, Kylie Jenner’s outfit for the Met Gala 2026 featured a bodice with “built-in nipples”; unfortunately the method of construction wasn’t disclosed but the consensus was the placement was “perfect” although the scale may suggest some artistic license for effect.  Fashion critics watch the Met Gala with great interest and their analysis was the concept of the piece was of a “…gown being slipped off, revealing the bodice beneath”, Ms Jenner thus captured “…in the process of undressing” as it were.  It was a playful idea and though such things are no longer able to shock, genuinely it was original and should be commended.  The event's “dress code” for 2026 was “fashion is art” though at the Met Gala it's more “suggested theme” than enforced code and designers have always interpreted things liberally.  While it could be argued Ms Jenner’s ensemble was more artifice than art, nobody seemed to mind and she wore it well.

Skims Ultimate Pierced Nipple Push-up Bra.

Of course, for such gowns to work (and that really is the correct expression), it relies on the wearer's nipples having appropriate fittings and these can be real (as body-piercings) or faux (attached with an adhesive or clamping device, the latter on the model of “clip-on” earrings).  However, what the use of light-weight fabrics should make possible is the material's attachment directly to the nipples with either a transparent surgical-grade glue or strategically placed double-sided tape ("boob-tape" or "tit-tape" in the jargon) but some of the effect would be lost because of the extent of the surface area of skin such adhesives would require.  More to the point, were it not done with genuine fittings (piercings or clamed-on), some of the “edginess” would be lost and it was this vibe Skims picked up on in the promotional video for “The Ultimate Pierced Nipple Push-up Bra”.  The tag line was: “Our sexiest bra gets even hotter with a faux nipple piercing design so you can get the ‘Ooo’ without the ouch!” and there’s no reason why, for certain events (if not the street), a Mugleresque gown couldn’t be hung from the bra’s fittings.  Done well, it could look good although Ms Jain likely would remain unimpressed.

Skims promotional video: “The Ultimate Pierced Nipple Push-up Bra”.    

The concept of "built-in nipples" is not a new idea.  In the early 1970s, several manufacturers advertised a line of bras with cups in a sheer fabric which offered coverage and support (within a limited mass range) but clung to the nipples' definition, the most celebrated being those of Austrian-born Rudolf "Rudi" Gernreich (1922–1985), remembered as the "designer" of the "monokini" (ie a bikini supplied without the top part).  This approach was for those who wanted to display the profile of their own nipples.  The "Nipple Bra" offered enhanced engineering was the ancestor of the SKIMS bra in that rather than using, as Herr Gernreich did, the human body's "built-in" nipples, it provided some.

The 1970s: Rudi's sheer bra (left & right) and the original Nipple Bra.

The pitch all those decades ago was aimed at those who wanted to look “provocative” and in 1975 to achieve that the “Nipple Bra” cost US$20 (US$114.42 adjusted for 2023) so Ms Kardashian setting her price at US$120.00 seems not unreasonable.  The somewhat obtuse contribution to averting climate change aside, reaction to the product included the observation the bra will provide permanently “perfectly aligned nipples”, something not always achieved by the real things because, like most body parts, between left and right, there’s often some variation in size, shape, direction or distance from the ground.  Like many aspects of structural engineering, “perfect alignment” is achieved often with slight adjustments to variables like strap length.

Rudi not required: Lindsay Lohan displays perfect alignment, Venice Beach, Los Angeles, California, 2011.

In the United States, patent law exists to protect inventions, processes, and methods rather than abstract ideas and the general criteria (interpreted with some latitude) for eligibility is that an invention should be novel, non-obvious, and useful.  What does qualify is the implementation or embodiment of an idea in a tangible form so while a mere thought or concept can't be patented, a specific application or embodiment of that idea can be and this includes a new product, process, machine, or composition of matter.  Within all that, patents can be granted to cover improvements made to existing inventions.  Whether SKIMS have applied for or been granted a patent isn't clear but several for products in this vein have been granted over the last 50-odd years.  On 24 August 1976 Mr Jakob E. Schmidt of Charlestown, Indiana was granted U.S. patent #3976083 (Brassiere Having Simulated Nipples) as well as #4241737 & #4127128 covering “Brassiere Having Simulated Nipples and Attachable-Detachable Nipple Simulators”.

Conceptual drawing supplied with application for patent #3976083 (Brassiere Having Simulated Nipples), granted 24 August 1976.  The patent expired 24 August 1993.

The abstract filed with the application for #3976083 included: A brassiere is disclosed having cups which are provided with a nipple-like protuberance simulating the bulge of a natural nipple. The nipple-like bulge or protuberance may be a built-in component of the brassiere, usually situated under the fabric of the cup; a component which is permanently attached to the external surface of the brassiere cop; or an individual structure which may be attached to or detached from the brassiere cup as will, by means of several linkage and attachment mechanisms.  Simulated nipples for a brassiere would offer an acceptable compromise for ladies who do not wish to go without a brassiere and a welcome release from the subconscious effects of the suppression brought on by wearing brassieres of the types variously available, which obliterate the nipple.  That’s informative but Ms Kardashian might have phrased things in a more "Tik-Tok friendly" way. 

A nipple patch (left), the nipple patch writ large to function as a special-purpose bra (centre) and the advertising concept (right) which could be used by the manufacturers of either the "nipple bra" or the "nipple patch".  All that would be required is transposing the photographs, depending on whether the object was to display or conceal.

However, while one niche market will like the idea of being “so provocative”, there are others who find the sight of their own nipples “too provocative” and for this niche, there are ranges of products which offer coverage and concealment, smoothing away any suggestion of a nipple with patches which can be worn under bras with cups of even the most sheer fabric.  Self-adhesive (using a skin-friendly temporary glue), they can also be used without a bra and the same technology has been adapted to larger-scale units which actually function as a bra.  Marketed as being ideal to be used when wearing “backless” dresses or tops, they’re also said to be easier to use than the “fashion tape” (better known in the industry as “booby tape” or “tit tape”), especially if being self-applied.  Helpfully, if one changes one’s mind after having smoothed away the nipples, stick-on nipples are available in a range of styles and colors.

Piece from Miguel Castro Freitas’s “Stardust Aphrodite” collection for Mugler, Paris Fashion Week, October. 2025.

Miguel Castro Freitas’s (b 1980) first collection for Mugler was called “Stardust Aphrodite” and the designer described the pieces as “a trilogy of glorified clichés”, the three elements being (1) oversize and bulky, with big fluffy fabrics or shoulder pads, (2) severely tailored with extreme hourglass figures or (3) lightweight, sheer dresses; critics detected some overlap in the use of the motifs.  Although there were a number of nods to Mugler’s historic use of materials in bulk for dramatic effect, the collection otherwise tended to the “less”, one eye catching piece a gown with sparkly silver stars, its straps hung from bare-breasted nipple piercings.  To re-assure those whose toes had curled, critics noted that one was made from “a very lightweight fabric”.  The technique had be seen before, a “nipple grown” the best-remembered thing from the catwalk from one of Mugler’s shows in 1998 and this year’s model was an acknowledged homage but apart from that, it certainly was on-theme, Victoria’s Secret unlikely to see much business generated from those taken with Stardust Aphrodite.

A fragment from Fashion Feed’s take on Paris Fashion Week, 2025.

Of course the point of the catwalk is it makes it possible to see a garment in motion, interacting with the body.  That can be transformative: an outfit that on a hanger or mannequin seemed bland or lifeless can, when worn by a strutting model, come alive although equally, one which seemed admirable when static might reveal flaws of design or in construction once on the move.  Had the already infamous “nipple-piercing gown” been assessed purely on the technical criteria usually applied it would have been judged a success because the suspended sparkly chiffon flowed and swished as the designer knew it would but that achievement wasn’t much commented upon because the usual factions quickly were posting, the l'art pour l'art (art for art's sake) crowd calling the piece “an artistic vision” and dismissing criticism as the unwanted intrusion of a resurgent “purity culture” while those who disapproved called it “inappropriate” and yet another example of the way women’s bodies are exploited for the benefit of the “male gaze”.

One perhaps daring observation was that despite “many of the biggest names in women’s fashion being gay men… their designs often over-sexualise women instead of empowering them.”  Quite how much of the collective energy of gay men over the years been devoted to empowering women isn't known but Indian fashion commentator Pranjal Jain (b 2001) seemed to speak for her faction by adding that having a model parade “…a topless dress down the runway” and presenting it homage to the original of a quarter-century earlier was absurd because in the particular social & political context of the late 1990s such a dress could be understood as something “sensuous and provocative” but in 2025, “…what the fuck was the topless dress doing next to structured blazers and mini dresses?  I can tell you, the dress was a social media stunt engineered for virality.  Yet again, a man using a woman’s body for shock value.”  “Here”, she concluded, “is a perfect example of how fashion is political and historical, because context matters.”  As it has been for centuries, the critical deconstruction of frocks remains a serious matter.

Chappell Roan on the red carpet, Grammy Awards, Crypto.com Arena, Los Angeles, California, February 2026.  The rich auburn hair worked well with the hues of the gown and body art.

Even if Mugler’s “Stardust Aphrodite” didn’t at once migrate from the Paris catwalk to high street stores, the house didn’t abandon the motif and in February 2026, singer Chappell Roan (stage name of Kayleigh Rose Amstutz, b 1998) wore another of Mugler's interpretations (this time a burgundy gown) for the walk down the red carpet at the 68^th Annual Grammy Awards.  Predictably the event’s most publicized outfit, men everywhere doubtless were intrigued at the possibilities but the immediate reaction of women, regardless of their views of the aesthetic, may have been an involuntary curling of the toes as they imagined donning the gown.  That phenomenon is known as “mirror-touch synesthesia” which describes the experience when, upon observing another individual being touched or injured, a corresponding tactile or pain sensation is elicited in the anatomically matching location in the observer’s own body.  It’s very common but is a spectrum condition, most experiencing it as momentary sensation but in rare cases there have been patients for whom the effects have been long-lasting.  Technically, it’s triggered by a (usually temporary) reduction in the “self–other distinction” at the neural processing level, the causes thought to include (1) an heightened cross-activation between the visual and somatosensory cortices and (2) hyperactive or atypical functioning of the brain’s mirror neuron system.  There seems to be evidence an individual’s susceptibility to mirror-touch synesthesia is more significant in frequency of occurrence than the perception of the extent of the sensation (eg severity of an injury) witnessed.

Mirror-touch synesthesia is quite specific in its “virtual emulation” and differs from the vicarious responses (typically, a flinching when seeing someone suffer an injury) in being usually qualitatively stronger and manifested by a location-specific somatic sensation; it may run in parallel with emotional empathy (which happens typically without the literal bodily sensation) but is a separate phenomenon.  There are of course exceptions and the traditional (probably culturally obligatory) reaction of cricketers seeing a batsman struck “in the groin region” by a ball (delivered sometimes at 90 mph (145 km/h) or more) is one of mirth rather than empathy.

Drawing the lens: Chappell Roan photographed in front of the backdrop.

It would however seem the toes of mirror-touch synesthetes may uncurl because in the many photographs and video clips circulated, Ms Roan appeared not at all discomforted and the physics of that would have been determined by (1) the use of faux nipple piercings, (2) the lightweight fabric and (3) the gathering at the waist, ensuring each nipple had to bear the weight only of a few square inches of material.  No doubt pleased (if not surprised) by the interest generated, Ms Roan insisted it was not “that outrageous of an outfit”, adding “the look’s actually so awesome and weird” before concluding “I recommend just exercising your free will; it’s really fun and silly.”  The look was complimented with temporary body art, an extensive lace panel spread over her bare back with a pony on the chest, both credited to artist Jenny Collins of Puppy Puppy Playtime; the gold choker and earrings were by Buccellati.  Perhaps disappointing some, the outfit made only a one-off appearance on the red carpet, Ms Roan changing into something warmer when serving as an award-presenter.

Semaphore

Semaphore (pronounced sem-uh-fawr or sem-uh-fohr)

(1) A “line-of-sight” apparatus (mechanical, hand-held or activated and now even electronic) for conveying information by means of visual signals (typically flags or lights, the positions of which are changed as required).

(2) Any of various devices for signaling by changing the position of a light, flag or other identifiable indicator.  Historically, a common use of “semaphore” was as a noun adjunct (also called a noun modifier or attributive noun) including “semaphore flag”, “semaphore chart”, “semaphore operator etc.

(3) A codified system of signaling, especially a system by which a special flag is held in each hand and various positions of the arms denoting specific letters, numbers etc.  It remains part of Admiralty signals training.

(4) In biochemistry (as semaphoring), any of a class of proteins that assist growing axons to find an appropriate target and to form synapses.

(5) In biology (as semaphoront), an organism as seen in a specific time during its ontogeny or life cycle, as the object of identification or basis for systematics.

(6) In botany (as semaphore plant), a synonym for the telegraph plant (Codariocalyx motorius), a tropical Asian shrub, one of the few plants capable of rapid movement and so named because the jerking motions of the leaves recalled in observers the actions of the arms of Admiralty signallers and the name dates from the Raj.

(7) In programming, a bit, token, fragment of code, or some other mechanism which is used to restrict access to a shared function or device to a single process at a time, or to synchronize and coordinate events in different processes, the thread increments the semaphore to prevent other threads from entering the critical section at the same time.

(8) In figurative use (in human and animal behavior), certain non-verbal communications, used consciously and unconsciously, the concept often explored as a literary device.

(9) To signal (information) by means of semaphore

1814: From the French sémaphore, the construct being the Ancient Greek, σῆμα (sêma) (mark, sign, token) + the French -phore (from the Ancient Greek -φόρος (-phóros), the suffix indicating a bearer or carrier) and thus understood as “a bearer of signals”.  The Greek –phóros was from pherein (to carry), from the primitive Indo-European root bher- (to carry).  The verb was derived from the noun.  Semaphore is a noun & verb, semaphorist, semaphoront & semaphorin are nouns, semaphored is a verb, semaphoring is a verb & adjective, semaphoric & semaphorical are adjectives and semaphorically is an adverb; the noun plural is semaphores.  The noun semaphorism is non-standard but is used in behavioral linguistics to describe patterns of language used to convey meaning in a “coded” form which can be deconstructed for meaning only by sender and receiver.  The form semaphoreology seems not to exist but if anyone ever makes a discipline of the study of semaphore (academic careers have been built from more improbable origins), presumably there will be semaphoreologists.

Chart of the standard semaphore alphabet (top left), a pair of semaphore flags (bottom left) and Lindsay Lohan practicing her semaphore signaling moves (just in case, should the need arise); this is the letter “N”.

Semaphore flags are not always red and yellow, but the colors are close to a universal standard, especially in naval and international signalling.  There was no intrinsic meaning denoted by the use of red & yellow, the hues chosen for their contrast and visual clarity, something important in maritime environments or other outdoor locations when light could often be less than ideal although importantly, the contrast was sustained even in bright sunshine.  Because semaphore often was used for ship-to-to ship signalling, the colors had to be not only easily distinguishable at a distance but not be subject to “melting” or “blending”, a critical factor when used on moving vessels in often pitching conditions, the operator’s moving arms adding to the difficulties.  In naval and maritime semaphore systems, the ICS (International Code of Signals) standardized full-solid red and yellow for the flags but variants do exist (red, white, blue & black seem popular) and these can be created for specific conditions, for a particular cultural context or even as promotional items.

L-I-N-D-S-A-Y-space-L-O-H-A-N spelled-out in ICS (International Code of Signals) semaphore.  One can't tell when this knowledge will come in handy.

Early automobiles were sometimes fitted with mechanical semaphore signals to indicate a driver’s intention to change direction; these the British called “trafficators” (“flippers” in casual use) and they were still being fitted in the late 1950s, by which time they’d long been illuminated to glow a solid amber.  What the mechanical semaphores did was use the model of the extended human arm, used by riders or drivers in the horse-drawn age to signal their intentions to others and although obviously vulnerable to damage, the devices were at the time a good solution although the plastics used from the 1930s were prone to fading, diminishing the brightness.  When electronics advanced to the point where sequentially flashing turn indicators (“flashers”) cheaply could be mass-produced the age of the semaphore signal ended although they did for a while persist on trucks where they were attached to the exterior of the driver’s door and hand activated.

Hand-operated semaphore signal on driver's door of RHD (right-hand-drive) truck (left), an Austin A30 with electrically-activated semaphore indicating impending leftward change of direction (centre) and electrically-activated right-side semaphore on 1937 Rolls-Royce Phantom III Gurney Nutting Touring Limousine (right).

The A30 (1952-1956) was powered by an 803 cm³ (49 cubic inch) four cylinder engine while the Phantom III (1936-1939) was fitted with a 7338 cm³ (447 cubic inch) V12 (noted diarist Sir Henry “Chips” Channon (1897–1958) owned one) so the driving experience was very different but both used the same Lucas semaphore assembly.  Note the "BEWARE, TRAFFICATORS IN USE" notice in A30's rear window.  Because drivers are no longer attuned to look for the now archaic semaphores, some jurisdictions (while still allowing their operation), will permit road registration only if supplementary flashing indicators (now usually amber) are fitted.  In the 1960s many trafficator-equipped cars were modernized with flashers and it's now only collectors or restorers who prize the originality of the obsolete.

Low-emission Trabant (rated at 1 PP (pony-power)) with driver using semaphore signal to indicate intention to turn left, Barnim district, Bernau bei Berlin, GDR, 1981.

As late as the 1960s, in some places, trucks & vans still were being built with a hand-operated semaphore mounted on the driver’s door and specialized vehicles likely also to have an occupant on the passenger-side (such as fire-engines) sometimes had two.  If need be they could also be improvised, as in the low-tech “lollipop” sign being used in this image of a two-seater buggy, a vehicle crafted using the salvageable section of a Trabant which may have suffered frontal damage in a crash.  Trabants really could go fast enough to have damaging crashes and although not engineered with the “crumple zones” which were introduced in the West as a way of absorbing an impact’s energy before it reached the occupants, in their own way, crumple Trabants did.  In the GDR (German Democratic Republic, the old East Germany), the long-running (1957-1991) Trabant's bodywork was made with Duroplast, a composite thermosetting plastic (and a descendant of Bakelite).  It was a resin plastic reinforced with fibres (the GDR used waste from both cotton & wool processing) and was structurally similar to fibreglass although the urban myth Trabants were made from reinforced cardboard persists.  The first Trabants left the Saxony production line in November 1957, only weeks after the Soviet Union had startled the world (certainly those in Pentagon and such places) by launching Sputnik, the first man-made Earth satellite.  Launched into an elliptical low Earth orbit where it circulated for three months, it did nothing other than transmit radio pulses which, because of the flight path, could at various time be detected just about anywhere below.  Compared with what space programmes would become, it sounds now a modest achievement but at the time was a sensation and the event which triggered the “space race”.

Two comrades approaching their 1957 Trabant P50 in stylish korallenrot (coral red) over creme (cream).  Note the amber turn signals; Trabants were factory-fitted with flashers at a time Rolls-Royce and other manufacturers in the “advanced West” were still installing antiquated semaphores.

In the Eastern Bloc there weren’t many marketing departments but there was a vast propaganda apparatus and opportunistically, the name Trabant was derived from the Middle High German drabant (satellite; companion; foot soldier) which at the time was a positive association with the famous Sputnik but it later became emblematic of the economic and moral bankruptcy of the whole communist project: While by the fall of the Berlin Wall (1961-1989) Soviet satellites and related technologies greatly had advanced, the “Trubi” remained a little changed “1957 time capsule”.  Although much despised in the early 1990s in the aftermath of the break-up of the Soviet Union (1922-1991), opinions softened and the survivors of the more than three million produced (a greater volume than BMC's (British Motor Corporation) Mini (1959-2000)) gained a cult following.  More correctly, the marque gained a number of cult followings, some attracted by the “retro-cuteness”, some with genuine, Putinesque nostalgia for the old Soviet system and other with a variety of projects as varied as EV (electric vehicle) conversions, the installation of V8s for drag-racing and the re-purposing in many forms of competition.

Two comrades with their 1960 Trabant P50 in stylish two-tone pastellblau (pastel blue) over creme (cream) admiring the Leipzig Opera building, Saxony, circa 1961.

The Trubi is now a fixture in the lower reaches (a notch above the Austin Allegro) of the collector market.  The photograph of the horse-drawn Trubi, while not representative of the entire Eastern Bloc experience under communist rule, captures a sight which would not have been uncommon away from large urban centres (which could be grim enough).  Dr Henry Kissinger (1923-2023; US national security advisor 1969-1975 & secretary of state 1937-1977) said his abiding memory of Eastern Bloc cities was of “the smell of boiled cabbage and an unrelenting greyness.”  In fairness, English cooks probably inflicted worse on the noble cabbage than anything done behind the Iron Curtain but his sense of “greyness” was literal, the appalling air pollution of the GDR (its industrial base powered by burning lignite (from the Latin lignum (wood)) and other forms of low-grade, “dirty coal”), thus the griminess of the buildings.  Places like London similarly were affected and it was only after the 1952 “Great Smog of London” that the Clean Air Act (1956) became law, meaning air quality began slowly to improve.  That the photographs of the era look so drab is not because of the film stock; buildings literally were “dirty”.  Because of various other advances in health care, it’s difficult to quantify the contribution to reducing mortality achieved by reducing air pollution but few doubt it was significant.

Left & right semaphore signals (trafficators): Lucas part number SF80 for one’s Austin A30, Morris Minor or Rolls-Royce Silver Wraith.  In the 1950s, the price may have varied between resellers.

Although the grim realities of post-war economics meant standardization began to intrude, even in the 1950s Rolls-Royce made much of things being “bespoke” and while that was still true of some of the coach-work, what lay beneath the finely finished surface was often from the industry parts-bin and the semaphore turn signals the company fitted to the Silver Wraith (1946-1958) and Silver Dawn (1949-1955) was Lucas part number SF80, exactly the same component used by the humble Austin A30 and Morris Minor (1948-1971) where the functionality was identical.  Presumably, were one to buy the part from Rolls-Royce one would have been charged more (perhaps it was wrapped in more elaborate packaging) and that’s a well-understood industry phenomenon.  The internet has made it easier to trace such commonalities but in the 1980s there was a most useful publication which listed shared part-numbers which differed only in the prices charged, a switch for a Lamborghini which might retail for hundreds available from the Fiat parts counter (a busy place folklore suggests) for $12 while those aghast at the price quoted for a small linkage in a Triumph’s Stag’s induction system were pleased the same thing could be bought from a Ford dealer for a fraction of the cost.  Rolls-Royce fitted their last trafficator in 1958 and when Austin updated the A30 as the A35 (1956-1968) flashers were standard equipment, metal covering the apertures where once the semaphores had protruded while internally there was a panel concealing what had once been an access point for servicing.  The Morris Minor, the last of which wasn’t (in CKD (completely knocked down) form) assembled in New Zealand until 1974(!) switched from trafficators to flashers in 1961, the exterior and interior gaps concealed al la the A35.

Left-side semaphore on 1951 Volkswagen Type 1 (Beetle).

The Latin sēmaphorum (the alternative form was sēmaphoru) is thought to be a calque of the Italian semaforo (traffic light), again borrowed from the French sémaphore in the literal sense of “signaling system”.  The modern Italian for “traffic light” is semaforo although (usually for humorous effect) sēmaphorum is sometimes used as Contemporary Latin.  Traffic lights have for over a century regulated the flow of vehicles in urban areas but the first semaphore signal predated motorized transport, installed in London in 1868.  It was introduced not because it would perform the task better than the policemen then allocated but because it was cheaper and was an example of the by then common phenomenon of machines displacing human labor.  The early mechanical devices were pre-programmed and thus didn’t respond to the dynamics of the environment being controlled and that applied also to the early versions of the now familiar red-amber-green “traffic lights” which began to proliferate in the 1920s but by the 1950s there were sometime sensors (weight-sensitive points in the road) which could “trigger” a green light if the pre-set timing was creating a needless delay.  Even before the emergence of AI (artificial intelligence) in the modern sense of the term, implementations of AI had been refining the way traffic light systems regulated vehicular flow and in major cities (China apparently the most advanced), cameras, sensors, face and number plate recognition all interact to make traffic lights control the flow with an efficiency no human(s) could match.

ASMR semaphore porn: 1955 Austin A30.  ASMR (Autonomous Sensory Meridian Response) describes the physical & psychological pleasure derived from specific stimuli (usually a sound).  For some, this can be the sight & sound of South Korean girls on TikTok eating noodles while for those fond of machines it can come from hearing semaphore turn-signals being raised and lowered.

Whether it was the early semaphore signals or the soon to be ubiquitous illumined red-amber-green lights, what the system relied on was compliance; inherently, lacking physical agency, a piece of colored glass can’t stop a car but that almost always is the effect of a “red light”.  In behaviorism, this was described as discriminative stimulus (SD) in that the red light culturally is understood as a universal cue signalling a punishment might follow any transgression (ie “running the red light”), thus the incentive to obey the signal and avoid negative consequences (crashing or being fined).  What SD does is control behavior through learned association.  The use of red comes from semiotics and the color is culturally assigned to “stop” as green is to “go”, these allocated by virtue of historical associations which long pre-date the technology in the same way semiotics are used (as red & blue) to denote “hot” & “cold” water when taps are labelled, meaning for travellers no knowledge of a local language is needed to work out which is which.  In the jargon, the red light is a “signifier” and the “signified” is stop.

Modern Mechanix magazine, January 1933.

Sir William Morris (1877-1963; later Lord Nuffield) held a number of troubling and even at the time unfashionable views and he’d been sceptical about producing the Morris Minor (1948-1971), describing the prototype as looking “like a poached egg”; in that he was right but the Minor proved a highly profitable, quarter century long success.  In the 1930s however, he did have the imaginative idea of adapting the by then familiar traffic light (in miniature form) to the automobile itself.  The concept was sound, Sir William’s proposed placement even anticipating the “eye level brake lights” of the 1980s and the inclusion of green in the code was interesting but the “mini traffic light” wasn’t taken up and lesson which should have been learned is that in the absence of legislation compelling change, the industry always will be most reluctant to invest and not until the 1960s would such mandates (for better and worse) begin to be imposed.

1947 Volvo P444 (1947-1958, left) and 2022 Volvo XC 40 (introduced 2017, right).  Volvo abandoned the semaphores years before the British but the designers clearly haven’t forgotten, the rear reflectors on the XC 40 using the shape.  Volvo replaced the semaphores with conventional flashers but not before the modernist Swedes had tried the odd inventive solution.

In idiomatic use, semaphore’s deployment tends to be metaphorical or humorous, the former used as a literary device, borrowed from behavioral psychology.  “To semaphore” can mean “wildly or exaggeratedly gesture” but can also convey the idea of a communication effected without explicitly stating something and that can either be as a form of “unspoken code” understood only between the interlocutors or something unconscious (often called body-language).  “Semaphoring a message” can thus be either a form of secret communication or something inferred from non-verbal clues.  Authors and poets are sometimes tempted to use “semaphore” metaphorically to describe emotional cues, especially across physical or emotional distance and one can imagine the dubious attraction for some of having “her sensuous lips silently semaphoring desire” or “her hungry eyes semaphored the truth”.  Among critics, the notion of “semaphoring” as one of the motifs of modernist literature was identified and TS Eliot’s (1888–1965) style in The Waste Land (1922) included coded fragments, often as disconnected voices and symbols, called by some an “emotional semaphore” while Samuel Beckett (1906-1989 and another Nobel laureate) was noted for having his characters exchange their feelings with repetitive gestures, signals and critically, silences, described variously as “gestural semaphore” or the “semaphoring of despair”.