| tribuneship | (noun) the position of tribune | - |
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| tributary | (noun) a branch that flows into the main stream | Synonyms: affluent, confluent, feeder |
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| tribute | (noun) payment by one nation for protection by another | - |
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| (noun) payment extorted by gangsters on threat of violence | Synonyms: protection |
| (noun) something given or done as an expression of esteem | Synonyms: testimonial |
| tributyrin | (noun) a bitter oily triglyceride of butyric acid; a form of butyrin | - |
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| trice | (noun) a very short time (as the time it takes the eye to blink or the heart to beat) | Synonyms: blink of an eye, flash, heartbeat, instant, jiffy, New York minute, split second, twinkling, wink |
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| triceps | (noun) any skeletal muscle having three origins (but especially the triceps brachii) | - |
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| triceratops | (noun) huge ceratopsian dinosaur having three horns and the neck heavily armored with a very solid frill | - |
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| trichina | (noun) parasitic nematode occurring in the intestines of pigs and rats and human beings and producing larvae that form cysts in skeletal muscles | Synonyms: Trichinella spiralis |
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| trichiniasis | (noun) infestation by trichina larvae that are transmitted by eating inadequately cooked meat (especially pork); larvae migrate from the intestinal tract to the muscles where they become encysted | Synonyms: myositis trichinosa, trichinosis |
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| trichinosis | (noun) infestation by trichina larvae that are transmitted by eating inadequately cooked meat (especially pork); larvae migrate from the intestinal tract to the muscles where they become encysted | Synonyms: myositis trichinosa, trichiniasis |
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| trichion | (noun) point where the hairline meets the midpoint of the forehead | Synonyms: crinion |
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| trichloride | (noun) any compound containing three chlorine atoms in each molecule | - |
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| trichlormethiazide | (noun) diuretic drug (trade name Naqua) used to treat hypertension | Synonyms: Naqua |
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| trichloroethane | (noun) a heavy colorless highly toxic liquid used as a solvent to clean electronic components and for dry cleaning and as a fumigant; causes cancer and liver and lung damage | Synonyms: TCE, trichloroethylene |
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| trichloroethylene | (noun) a heavy colorless highly toxic liquid used as a solvent to clean electronic components and for dry cleaning and as a fumigant; causes cancer and liver and lung damage | Synonyms: TCE, trichloroethane |
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| trichloromethane | (noun) a volatile liquid haloform (CHCl3); formerly used as an anesthetic | Synonyms: chloroform |
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| trichobezoar | (noun) a compact mass of hair that forms in the alimentary canal (especially in the stomach of animals as a result of licking fur) | Synonyms: hair ball, hairball |
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| trichodesmium | (noun) large colonial bacterium common in tropical open-ocean waters; important in carbon and nitrogen fixation | - |
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| trichomonad | (noun) cause of trichomoniasis in women and cattle and birds | - |
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| trichomoniasis | (noun) infection of the vagina | - |
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| trichopteran | (noun) caddis fly | Synonyms: trichopteron, trichopterous insect |
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| trichopteron | (noun) caddis fly | Synonyms: trichopteran, trichopterous insect |
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| trichotillomania | (noun) an irresistible urge to pull out your own hair | - |
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| trichotomy | (noun) being threefold; a classification into three parts or subclasses | - |
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| trichroism | (noun) pleochroism of a crystal so that it exhibits three different colors when viewed from three different directions | - |
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| trichromacy | (noun) the normal ability to see colors | Synonyms: chromatic vision, color vision |
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| trichuriasis | (noun) infestation by a roundworm; common in tropical areas with poor sanitation | - |
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| trick | (noun) a ludicrous or grotesque act done for fun and amusement | Synonyms: antic, caper, joke, prank, put-on |
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| (noun) (card games) in a single round, the sequence of cards played by all the players; the high card is the winner | - |
| (noun) an illusory feat; considered magical by naive observers | Synonyms: conjuration, conjuring trick, deception, illusion, legerdemain, magic, magic trick, thaumaturgy |
| (noun) an attempt to get you to do something foolish or imprudent | - |
| (noun) a cunning or deceitful action or device | Synonyms: fast one |
| (noun) a prostitute's customer | Synonyms: john, whoremaster, whoremonger |
| (noun) a period of work or duty | - |
| tricker | (noun) someone who plays practical jokes on others | Synonyms: cut-up, hoaxer, practical joker, prankster, trickster |
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| trickery | (noun) the use of tricks to deceive someone (usually to extract money from them) | Synonyms: chicane, chicanery, guile, shenanigan, wile |
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| (noun) verbal misrepresentation intended to take advantage of you in some way | Synonyms: hanky panky, hocus-pocus, jiggery-pokery, skulduggery, skullduggery, slickness |
| trickiness | (noun) the quality of being a slippery rascal | Synonyms: rascality, shiftiness, slipperiness |
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| (noun) the quality of requiring skill or caution | - |
| trickle | (noun) flowing in drops; the formation and falling of drops of liquid | Synonyms: dribble, drip |
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| trickster | (noun) someone who plays practical jokes on others | Synonyms: cut-up, hoaxer, practical joker, prankster, tricker |
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| (noun) someone who leads you to believe something that is not true | Synonyms: beguiler, cheat, cheater, deceiver, slicker |
| (noun) a mischievous supernatural being found in the folklore of many primitive people; sometimes distinguished by prodigious biological drives and exaggerated bodily parts | - |
| triclinium | (noun) a dining table with couches along three sides in ancient Rome | - |
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| (noun) a dining room (especially a dining room containing a dining table with couches along three sides) | - |
| tricolor | (noun) a flag having three colored stripes (especially the French flag) | Synonyms: tricolour |
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| tricolour | (noun) a flag having three colored stripes (especially the French flag) | Synonyms: tricolor |
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| tricorn | (noun) cocked hat with the brim turned up to form three points | Synonyms: tricorne |
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| tricorne | (noun) cocked hat with the brim turned up to form three points | Synonyms: tricorn |
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| tricot | (noun) a knitted fabric or one resembling knitting | - |
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| tricycle | (noun) a vehicle with three wheels that is moved by foot pedals | Synonyms: trike, velocipede |
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| tricyclic | (noun) an antidepressant drug that acts by blocking the reuptake of norepinephrine and serotonin and thus making more of those substances available to act on receptors in the brain | Synonyms: tricyclic antidepressant, tricyclic antidepressant drug |
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| trident | (noun) a spear with three prongs | - |
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| tridymite | (noun) a mineral form of silica | - |
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| triennial | (noun) the 300th anniversary (or the celebration of it) | Synonyms: tercentenary, tercentennial |
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| trier | (noun) one who tries | Synonyms: attempter, essayer |
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| (noun) one (as a judge) who examines and settles a case | - |
| trifle | (noun) something of small importance | Synonyms: small beer, trivia, triviality |
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| (noun) a detail that is considered insignificant | Synonyms: triviality |
| (noun) a cold pudding made of layers of sponge cake spread with fruit or jelly; may be decorated with nuts, cream, or chocolate | - |
| trifler | (noun) one who behaves lightly or not seriously | - |
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| trifling | (noun) the deliberate act of delaying and playing instead of working | Synonyms: dalliance, dawdling |
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| trifluoromethane | (noun) colorless gas haloform CHF3 (similar to chloroform) | Synonyms: fluoroform |
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| trifoliata | (noun) small fast-growing spiny deciduous Chinese orange tree bearing sweetly scented flowers and decorative but inedible fruit: used as a stock in grafting and for hedges | Synonyms: Poncirus trifoliata, trifoliate orange, wild orange |
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| trifurcation | (noun) the act of splitting into three branches | - |
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| trig | (noun) the mathematics of triangles and trigonometric functions | Synonyms: trigonometry |
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| trigeminal | (noun) the main sensory nerve of the face and motor nerve for the muscles of mastication | Synonyms: fifth cranial nerve, nervus trigeminus, trigeminal nerve, trigeminus |
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| trigeminus | (noun) the main sensory nerve of the face and motor nerve for the muscles of mastication | Synonyms: fifth cranial nerve, nervus trigeminus, trigeminal, trigeminal nerve |
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| trigger | (noun) an act that sets in motion some course of events | Synonyms: induction, initiation |
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| (noun) lever that activates the firing mechanism of a gun | Synonyms: gun trigger |
| (noun) a device that activates or releases or causes something to happen | - |
| triggerfish | (noun) any of numerous compressed deep-bodied tropical fishes with sandpapery skin and erectile spines in the first dorsal fin | - |
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| triggerman | (noun) a professional killer who uses a gun | Synonyms: gun, gun for hire, gunman, gunslinger, hired gun, hit man, hitman, shooter, torpedo |
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| triglyceride | (noun) glyceride occurring naturally in animal and vegetable tissues; it consists of three individual fatty acids bound together in a single large molecule; an important energy source forming much of the fat stored by the body | - |
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| trigon | (noun) a triangular lyre of ancient Greece and Rome | - |
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| (noun) (astrology) one of four groups of the zodiac where each group consists of three signs separated from each other by 120 degrees | Synonyms: triplicity |
| (noun) a three-sided polygon | Synonyms: triangle, trilateral |
| trigonometrician | (noun) a mathematician specializing in trigonometry | - |
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| trigonometry | (noun) the mathematics of triangles and trigonometric functions | Synonyms: trig |
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| trigram | (noun) a word that is written with three letters in an alphabetic writing system | - |
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| triiodomethane | (noun) a yellowish crystalline solid with a penetrating odor; sometimes used as an antiseptic dressing | Synonyms: iodoform |
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| triiodothyronine | (noun) thyroid hormone similar to thyroxine but with one less iodine atom per molecule and produced in smaller quantity; exerts the same biological effects as thyroxine but is more potent and briefer | Synonyms: liothyronine, T |
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| trike | (noun) a vehicle with three wheels that is moved by foot pedals | Synonyms: tricycle, velocipede |
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| trilateral | (noun) a three-sided polygon | Synonyms: triangle, trigon |
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| trilby | (noun) a hat made of felt with a creased crown | Synonyms: fedora, felt hat, homburg, Stetson |
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| trill | (noun) a note that alternates rapidly with another note a semitone above it | Synonyms: shake |
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| (noun) the articulation of a consonant (especially the consonant `r') with a rapid flutter of the tongue against the palate or uvula | - |
| trillion | (noun) the number that is represented as a one followed by 12 zeros | Synonyms: 1000000000000, one million million |
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| (noun) the number that is represented as a one followed by 18 zeros in the UK | Synonyms: one million million million |
| (noun) a very large indefinite number (usually hyperbole) | Synonyms: bazillion, billion, gazillion, jillion, million, zillion |
| trillionth | (noun) one part in a trillion equal parts | Synonyms: one-trillionth |
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| trillium | (noun) any liliaceous plant of the genus Trillium having a whorl of three leaves at the top of the stem with a single three-petaled flower | Synonyms: wake-robin, wood lily |
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| trilobite | (noun) an extinct arthropod that was abundant in Paleozoic times; had an exoskeleton divided into three parts | - |
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| trilogy | (noun) a set of three literary or dramatic works related in subject or theme | - |
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| trim | (noun) cutting down to the desired size or shape | Synonyms: clipping, trimming |
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| (noun) a decoration or adornment typically on the edge of a garment | Synonyms: passementerie, trimming |
| (noun) attitude of an aircraft in flight when allowed to take its own orientation | - |
| (noun) a state of arrangement or appearance | Synonyms: trimness |
| trimaran | (noun) a fast sailboat with 3 parallel hulls | - |
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| trimer | (noun) a polymer (or a molecule of a polymer) consisting of three identical monomers | - |
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| trimester | (noun) a period of three months; especially one of the three three-month periods into which human pregnancy is divided | - |
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| (noun) one of three divisions of an academic year | - |
| trimipramine | (noun) tricyclic antidepressant drug (trade name Surmontil) used to treat depression and anxiety and (sometimes) insomnia | Synonyms: Surmontil |
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| trimmer | (noun) joist that receives the end of a header in floor or roof framing in order to leave an opening for a staircase or chimney etc. | Synonyms: trimmer joist |
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| (noun) capacitor having variable capacitance; used for making fine adjustments | Synonyms: trimming capacitor |
| (noun) a machine that trims timber | - |
| (noun) a worker who thins out and trims trees and shrubs | Synonyms: pruner |
| trimming | (noun) the act of adding decoration | - |
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| (noun) cutting down to the desired size or shape | Synonyms: clipping, trim |
| (noun) a decoration or adornment typically on the edge of a garment | Synonyms: passementerie, trim |
| trimmings | (noun) the accessories that normally accompany (something or some activity) | Synonyms: fixings |
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| trimness | (noun) a state of arrangement or appearance | Synonyms: trim |
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| trine | (noun) the cardinal number that is the sum of one and one and one | Synonyms: 3, deuce-ace, III, leash, tercet, ternary, ternion, terzetto, three, threesome, tierce, trey, triad, trinity, trio, triplet, troika |
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| trinitroglycerin | (noun) a heavy yellow poisonous oily explosive liquid obtained by nitrating glycerol; used in making explosives and medically as a vasodilator (trade names Nitrospan and Nitrostat) | Synonyms: glyceryl trinitrate, nitroglycerin, nitroglycerine, Nitrospan, Nitrostat |
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| trinitrotoluene | (noun) explosive consisting of a yellow crystalline compound that is a flammable toxic derivative of toluene | Synonyms: TNT |
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| trinity | (noun) three people considered as a unit | Synonyms: threesome, triad, trio |
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| (noun) the cardinal number that is the sum of one and one and one | Synonyms: 3, deuce-ace, III, leash, tercet, ternary, ternion, terzetto, three, threesome, tierce, trey, triad, trine, trio, triplet, troika |
| trinket | (noun) cheap showy jewelry or ornament on clothing | Synonyms: bangle, bauble, fallal, gaud, gewgaw, novelty |
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| trinketry | (noun) trinkets and other ornaments of dress collectively | - |
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| trio | (noun) a musical composition for three performers | - |
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| (noun) three people considered as a unit | Synonyms: threesome, triad, trinity |
| (noun) a set of three similar things considered as a unit | Synonyms: triad, triple, triplet |
| (noun) three performers or singers who perform together | - |
| (noun) the cardinal number that is the sum of one and one and one | Synonyms: 3, deuce-ace, III, leash, tercet, ternary, ternion, terzetto, three, threesome, tierce, trey, triad, trine, trinity, triplet, troika |
| triode | (noun) a thermionic vacuum tube having three electrodes; fluctuations of the charge on the grid control the flow from cathode to anode which makes amplification possible | - |
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| triolein | (noun) a naturally occurring glyceride of oleic acid that is found in fats and oils | Synonyms: olein |
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| triose | (noun) any monosaccharide sugar containing three atoms of carbon per molecule | - |
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| trioxide | (noun) an oxide containing three atoms of oxygen in the molecule | - |
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| trip | (noun) a journey for some purpose (usually including the return) | - |
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| (noun) an unintentional but embarrassing blunder | Synonyms: misstep, stumble, trip-up |
| (noun) a light or nimble tread | - |
| (noun) a catch mechanism that acts as a switch | Synonyms: tripper |
| (noun) an accidental misstep threatening (or causing) a fall | Synonyms: slip |
| (noun) an exciting or stimulating experience | Synonyms: head trip |
| (noun) a hallucinatory experience induced by drugs | - |
| tripalmitin | (noun) a triglyceride of palmitic acid | Synonyms: glycerol tripalmitate |
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| tripe | (noun) nonsensical talk or writing | Synonyms: applesauce, codswallop, folderol, rubbish, trash, trumpery, wish-wash |
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| (noun) lining of the stomach of a ruminant (especially a bovine) used as food | - |
| triphammer | (noun) a massive power hammer; raised by a cam until released to fall under gravity | - |
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| triphosphopyridine | (noun) a pyridine ring with three phosphorus groups | - |
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| triple | (noun) a base hit at which the batter stops safely at third base | Synonyms: three-bagger, three-base hit |
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| (noun) a quantity that is three times as great as another | - |
| (noun) a set of three similar things considered as a unit | Synonyms: triad, trio, triplet |
| triplet | (noun) a set of three similar things considered as a unit | Synonyms: triad, trio, triple |
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| (noun) one of three offspring born at the same time from the same pregnancy | - |
| (noun) the cardinal number that is the sum of one and one and one | Synonyms: 3, deuce-ace, III, leash, tercet, ternary, ternion, terzetto, three, threesome, tierce, trey, triad, trine, trinity, trio, troika |