triskaidekaphobia (n.) Look up triskaidekaphobia at Dictionary.com
"fear of the number 13," 1908, also triskaidecaphobia, from Greek treiskaideka, triskaideka "thirteen" (from treis "three" + deka "ten") + -phobia "fear."
triskelion (n.) Look up triskelion at Dictionary.com
"figure consisting of three branches radiating from a center," 1880, earlier triskelos (1857), from Greek triskeles "three-legged," from tri- "three" (see tri-) + skelos "leg" (see scoliosis).
trismus (n.) Look up trismus at Dictionary.com
"lockjaw," 1690s, Modern Latin, from Greek trismos "a scream; a grinding, rasping," akin to trizein "to chirp, gnash," imitative.
trisomy (n.) Look up trisomy at Dictionary.com
1930, from trisome (from tri- + ending from chromosome) + -y (4).
trist (adj.) Look up trist at Dictionary.com
"sorrowful," early 15c., from French triste "sad, sadness" (10c.), from Latin tristis "sad, mournful, sorrowful, gloomy." Re-borrowed late 18c. (as "dull, uninteresting") as a French word in English and often spelled triste.
Tristram Look up Tristram at Dictionary.com
masc. proper name, name of a medieval hero, from Welsh Drystan, influenced by French triste "sad" (see trist). The German form is Tristan.
trite (adj.) Look up trite at Dictionary.com
"used till so common as to have lost its novelty and interest," 1540s, from Latin tritus "worn, oft-trodden," of language "much-used, familiar, commonplace," past participle adjective from terere "to rub, wear down" (see throw (v.)). Related: Tritely; triteness.
triticale (n.) Look up triticale at Dictionary.com
hybrid cereal grass, 1952, from Modern Latin Triti(cum) "wheat" (literally "grain for threshing," from tritus, past participle of terere "to rub, thresh, grind") + (Se)cale "rye."
tritium (n.) Look up tritium at Dictionary.com
1933, Modern Latin, from Greek tritos "third" (see third) + chemical suffix -ium.
Triton Look up Triton at Dictionary.com
minor sea god, son of Poseidon and Amphitrite, from Latin Triton, from Greek Triton, cognate with Old Irish triath (genitive trethan) "sea."
triturate (v.) Look up triturate at Dictionary.com
"grind into powder," 1755, from Late Latin trituratus, past participle of triturare "to thresh, to grind," from Latin tritura "a rubbing, a threshing," from past participle stem of terere "to rub" (see throw (v.)). Related: Triturated; triturating.
trituration (n.) Look up trituration at Dictionary.com
1640s, from Late Latin triturationem (nominative trituratio), noun of action from past participle stem of Latin triturare "to grind" (see triturate).
triumph (n.) Look up triumph at Dictionary.com
late 14c., "success in battle, conquest," also "spiritual victory" and "a procession celebrating victory in war," from Old French triumphe (12c., Modern French triomphe), from Latin triumphus "an achievement, a success; celebratory procession for a victorious general or admiral," from Old Latin triumpus, probably via Etruscan from Greek thriambos "hymn to Dionysus," a loan-word from a pre-Hellenic language.
triumph (v.) Look up triumph at Dictionary.com
mid-15c., from Old French triumpher (13c.), from Latin triumphare, from triumphus (see triumph (n.)). Related: Triumphed; triumphing.
triumphal (adj.) Look up triumphal at Dictionary.com
early 15c., from Latin triumphalis, from triumphus (see triumph (n.)). Related: Triumphally.
triumphant (adj.) Look up triumphant at Dictionary.com
early 15c., from Latin triumphantem (nominative triumphans), present participle of triumphare (see triumph (n.)). Related: Triumphantly.
triumvir (n.) Look up triumvir at Dictionary.com
"one of three men in the same office or of the same authority," mid-15c., from Latin triumvir, from Old Latin phrase trium virum, genitive plural of tres viri "three men," from tres "three" (see three) + viri, plural of vir "man" (see virile). The Latin plural was triumviri.
triumvirate (n.) Look up triumvirate at Dictionary.com
1580s, from Latin triumviratus, from triumvir (see triumvir).
triune (adj.) Look up triune at Dictionary.com
"three in one," 1630s, from tri- + Latin unus "one" (see one). Related: Triunity.
trivet (n.) Look up trivet at Dictionary.com
three-legged iron stand, 12c., trefet, probably from a noun use of Latin tripedem (nominative tripes) "three-footed," from tri- "three" (see three) + pes "foot" (see foot (n.)).
trivia (n.) Look up trivia at Dictionary.com
"trivialities, bits of information of little consequence," by 1934, probably from the title of a book by U.S.-born British aphorist Logan Pearsall Smith (1865-1946) first published in 1902, with "More Trivia" following in 1921 and a collected edition including both in 1933, containing short essays often tied to observation of small things and commonplace moments. Trivia is Latin, plural of trivium "place where three roads meet," in transferred use, "an open place, a public place," the adjectival form of which, trivialis, meant "public," hence "common, commonplace" (see trivial).
I KNOW too much; I have stuffed too many of the facts of History and Science into my intellectuals. My eyes have grown dim over books; believing in geological periods, cave dwellers, Chinese Dynasties, and the fixed stars has prematurely aged me. ["Trivia," 1918 edition]
Then noted c.1965 as an informal fad game among college students wherein one asked questions about useless bits of information from popular culture ("What was Donald Duck's address?") and others vied to answer first.
Nobody really wins in this game which concentrates on sports, comics and television. Everyone knows that Amos's wife on the "Amos 'n' Andy Show" is Ruby, but who knows that she is from Marietta, Georgia? Trivia players do. They also know the fourth man in the infield of Tinker-to-Evers-to-Chance, the Canadian who shot down Baron Von Richtofen, and can name ten Hardy Boy books. ["Princeton Alumni Weekly," Nov. 9, 1965]
The word is used in its literal Latin sense in John Gay's poem "Trivia: Or, the Art of Walking the Streets of London" (1716). The board game Trivial Pursuit was released 1982 and was a craze in U.S. for several years thereafter.
trivial (adj.) Look up trivial at Dictionary.com
"ordinary" (1580s); "insignificant, trifling" (1590s), from Latin trivialis "common, commonplace, vulgar," literally "of or belonging to the crossroads," from trivium "place where three roads meet," in transferred use, "an open place, a public place," from tri- "three" (see three) + via "road" (see via). The sense connection is "public," hence "common, commonplace."

The earliest use of the word in English was early 15c., a separate borrowing in the academic sense "of the trivium" (the first three liberal arts -- grammar, rhetoric, and logic); from Medieval Latin use of trivialis in the sense "of the first three liberal arts," from trivium, neuter of the Latin adjective trivius "of three roads." Related: Trivially. For sense evolution to "pertaining to useless information," see trivia.
triviality (n.) Look up triviality at Dictionary.com
1590s, "quality of being trivial," from Middle French trivialite or else from trivial + -ity. Meaning "a trivial thing or affair" is from 1610s. Related: Trivialities.
trivialize (v.) Look up trivialize at Dictionary.com
1836, from trivial + -ize. Related: Trivialized; trivializing.
trivium (n.) Look up trivium at Dictionary.com
1804, from Medieval Latin trivium "grammar, rhetoric, and logic," first three of the seven liberal arts in the Middle Ages, considered initiatory, rudimentary, and less important than the other four, arithmetic, geometry, astronomy, and music. From Latin trivium, in classical Latin "place where three roads meet" (see trivial).
trochaic (adj.) Look up trochaic at Dictionary.com
"composed of trochees," 1580s, from Middle French trochaïque (1540s) or directly from Latin trochaicus, from Greek trokhaikos "pertaining to or consisting of trochees," from trokhaios (see trochee).
trochanter (n.) Look up trochanter at Dictionary.com
1610s as a part of the thigh-bone, from French trochanter (16c.), from Greek trokhanter (Galen), from trekhein "to run" (see truckle (n.)). From 1816 as the second joint of an insect leg.
trochee (n.) Look up trochee at Dictionary.com
metrical foot consisting of a long followed by a short syllable, or an accented followed by an unaccented one, 1580s, from French trochée, from Latin trochaeus "a trochee," from Greek trokhaios (pous), literally "a running (foot)," from trekhein "to run" (see truckle (n.)). Its rapid movement rendered it a fit accompaniment to dances.
trod Look up trod at Dictionary.com
past tense of tread (v.).
trodden (adj.) Look up trodden at Dictionary.com
"that has been stepped on," 1540s, past participle adjective from tread (v.). The past participle was altered from Middle English treden under influence of Middle English past participles such as stolen from steal.
trog (n.) Look up trog at Dictionary.com
"obnoxious person, boor, lout," 1956, short for troglodyte.
troglodyte (n.) Look up troglodyte at Dictionary.com
"cave-dweller," 1550s, from Middle French troglodyte and directly from Latin troglodytae (plural), from Greek troglodytes "cave-dweller, cave-man" (in reference to tribes identified as living in various places by ancient writers; by Herodotus on the African coast of the Red Sea), literally "one who creeps into holes," from trogle "hole, mouse-hole" (from trogein "to gnaw, nibble, munch;" see trout) + dyein "go in, dive in." Related: Troglodytic.
troika (n.) Look up troika at Dictionary.com
1842, "carriage drawn by three horses abreast," from Russian troika "three-horse team, any group of three," from collective numeral troje "group of three" (from PIE *tro-yo-, suffixed form of *trei-, see three) + diminutive suffix -ka. Sense of "any group of three administrators, triumvirate" is first recorded 1945.
Trojan (adj.) Look up Trojan at Dictionary.com
Old English Troian "of or pertaining to ancient Troy," from Latin Trojanus, from Troia, Troja "Troy," from the Greek name for the city, said to be from Tros, name of a king of Phrygia, the mythical founder of Troy. Trojan horse was figurative of ambush-from-within in Roman times (equus Troianus); attested in English from 1570s; the computer virus sense is attested by 1982.

As a noun from mid-14c., "inhabitant of ancient Troy;" in early modern English, the noun could mean "a determined fellow, one who fights or works hard," from the Trojans' long resistance to the Greeks in the Trojan War, but also in 17c., it was a colloquial term for "person of dissolute life, carousing companion." The trade name for a brand of prophylactic contraceptive was registered 1927 in U.S.
troll (v.) Look up troll at Dictionary.com
late 14c., "to go about, stroll," later (early 15c.) "roll from side to side, trundle," probably from Old French troller, a hunting term, "wander, to go in quest of game without purpose" (Modern French trôler), from a Germanic source (compare Old High German trollen "to walk with short steps"), from Proto-Germanic *truzlanan.

Sense of "sing in a full, rolling voice" (first attested 1570s) and that of "fish with a moving line" (c.1600) both are extended technical uses from the general sense of "roll, trundle," the former from "sing in the manner of a catch or round," the latter perhaps confused with trail or trawl. Figurative sense of "to lure on as with a moving bait, entice, allure" is from 1560s. Meaning "to cruise in search of sexual encounters" is recorded from 1967, originally in homosexual slang.
troll (n.1) Look up troll at Dictionary.com
supernatural being in Scandinavian mythology and folklore, 1610s (with an isolated use mid-14c.), from Old Norse troll "giant being not of the human race, evil spirit, monster." Some speculate that it originally meant "creature that walks clumsily," and derives from Proto-Germanic *truzlan, from *truzlanan (see troll (v.)). But it seems to have been a general supernatural word, such as Swedish trolla "to charm, bewitch;" Old Norse trolldomr "witchcraft."

The old sagas tell of the troll-bull, a supernatural being in the form of a bull, as well as boar-trolls. There were troll-maidens, troll-wives, and troll-women; the trollman, a magician or wizard, and the troll-drum, used in Lappish magic rites. The word was popularized in literary English by 19c. antiquarians, but it has been current in the Shetlands and Orkneys since Viking times. The first record of the word in modern English is from a court document from the Shetlands, regarding a certain Catherine, who, among other things, was accused of "airt and pairt of witchcraft and sorcerie, in hanting and seeing the Trollis ryse out of the kyrk yeard of Hildiswick."

Originally conceived as a race of malevolent giants, they have suffered the same fate as the Celtic Danann and by 19c. were regarded by peasants in in Denmark and Sweden as dwarfs and imps supposed to live in caves or under the ground.
They are obliging and neighbourly; freely lending and borrowing, and elsewise keeping up a friendly intercourse with mankind. But they have a sad propensity to thieving, not only stealing provisions, but even women and children. [Thomas Keightley, "The Fairy Mythology," London, 1850]
troll (n.2) Look up troll at Dictionary.com
"act of going round, repetition," 1705, from troll (v.). Meaning "song sung in a round" is from 1820.
trolley (n.) Look up trolley at Dictionary.com
1823, in Suffolk dialect, "a cart," especially one with wheels flanged for running on a track (1858), probably from troll (v.) in the sense of "to roll." Sense transferred to "device used to transmit electric current to streetcars, consisting of a trolley wheel which makes contact with the overhead wires" (1888), then "streetcar drawing power by a trolley" (1891), which probably is short for trolley-car, attested from 1889.
trollop Look up trollop at Dictionary.com
1610s, "slovenly woman," often with implications of moral looseness, probably from troll (v.) in sense of "roll about, wallow."
[A] certain Anne Hayward, wife of Gregory Hayward of Beighton, did in the parishe church of Beighton aforesaid in the time of Divine Service or Sermon there, and when the Minister was reading & praying, violently & boisterously presse & enter into the seat or place where one Elizabeth, wife of Robert Spurlinir, was quietly at her Devotion & Duty to Almighty God and then and there did quarrel chide & braule & being evilly & inalitiously bent did use then and there many rayleing opprobrious Speeches & Invectives against the said Elizabeth calling her Tripe & Trallop, to the great disturbance both of the Minister and Congregation. [Archdeaconry of Sudbury, Suffolk, Court Proceedings, 1682]
trombone (n.) Look up trombone at Dictionary.com
brass wind instrument, 1724, from Italian trombone, augmentative form of tromba "trumpet," from a Germanic source (compare Old High German trumba "trumpet;" see trumpet (n.)).
tromp (v.) Look up tromp at Dictionary.com
1892, variant of tramp (v.); mainly American English. Related: Tromped; tromping.
trompe l'oeil Look up trompe l'oeil at Dictionary.com
1889, French, literally "deceives the eye," from tromper "to deceive," a verb of uncertain origin and the subject of many theories (see trump (v.2)).
troop (n.) Look up troop at Dictionary.com
1540s, "body of soldiers," 1540s, from Middle French troupe, from Old French trope "band of people, company, troop, crowd" (13c.), of uncertain origin, perhaps from Frankish *throp "assembly, gathering of people" or another Germanic source, perhaps related to Old English ðorp, Old Norse thorp "village" (see thorp). OED derives the French word from Latin troppus "flock," which is of unknown origin but also might be from the proposed Germanic source. Of groups of animals from 1580s. Specifically as "a subdivision of a cavalry force" from 1580s; of Boy Scouts from 1908. Troops "armed forces" is from 1590s.
troop (v.) Look up troop at Dictionary.com
1560s, "to assemble," from troop (n.). Meaning "to march" is recorded from 1590s; that of "to go in great numbers, to flock" is from c.1600. Related: Trooped; trooping.
trooper (n.) Look up trooper at Dictionary.com
1630s, "soldier in a cavalry troop," from troop (n.) + -er (1). Extended to "mounted policeman" (1858, in Australia) then to "state policeman" (U.S.) by 1911.
trope (n.) Look up trope at Dictionary.com
1530s, from Latin tropus "a figure of speech," from Greek tropos "a turn, direction, course, way; manner, fashion," in rhetoric, "turn or figure of speech," related to trope "a turning" and trepein "to turn," from PIE root trep- (2) "to turn" (cognates: Sanskrit trapate "is ashamed, confused," properly "turns away in shame;" Latin trepit "he turns"). Technically, in rhetoric, "a figure of speech which consists in the use of a word or phrase in a sense other than that which is proper to it" [OED], "as when we call a stupid fellow an ass, or a shrewd man a fox" [Century Dictionary].
trophic (adj.) Look up trophic at Dictionary.com
"of or pertaining to nutrition, food, or nourishment," 1856, from Greek trophikos, from trophe "nourishment, food" (see -trophy).
tropho- Look up tropho- at Dictionary.com
before vowels, troph-, word-forming element meaning "nourishment, food," from comb. form of Greek trophe "nourishment" (see -trophy).
trophy (n.) Look up trophy at Dictionary.com
1510s, "a spoil or prize of war," from Middle French trophée (15c.) from Latin trophaeum "a sign of victory, monument," originally tropaeum, from Greek tropaion "monument of an enemy's defeat," noun use of neuter of adjective tropaios "of defeat, causing a rout," from trope "a rout," originally "a turning" (of the enemy); see trope. In ancient Greece, spoils or arms taken in battle and set up on the field and dedicated to a god. Figurative extension to any token or memorial of victory is first recorded 1560s. As "a symbolic representation of a classical trophy" from 1630s. Trophy wife attested by 1984.
tropic (n.) Look up tropic at Dictionary.com
late 14c., "either of the two circles in the celestial sphere which describe the northernmost and southernmost points of the ecliptic," from Late Latin tropicus "of or pertaining to the solstice" (as a noun, "one of the tropics"), from Latin tropicus "pertaining to a turn," from Greek tropikos "of or pertaining to a turn or change; of or pertaining to the solstice" (as a noun, "the solstice," short for tropikos kyklos), from trope "a turning" (see trope).

The notion is of the point at which the sun "turns back" after reaching its northernmost or southernmost point in the sky. Extended 1520s to the corresponding latitudes on the earth's surface (23 degrees 28 minutes north and south); meaning "region between the tropics of Cancer and Capricorn" is from 1837.