Word origins

• tomomaniaA morbid addiction to performing or undergoing surgery.
• -tomyA division.
• tono-Tonus: muscle tone, or tension in an organ.
• tonophantA modification of the kaleidophone, for showing the composition of acoustic vibrations. It consists of two thin slips of steel welded together, their length being adjustable by a screw socket.
• toparchThe prince or ruler of a small district, city, or petty state; a petty "king".
• topazoliteA yellowish form of andradite
• -topeplace, area or region
• -topiaPlace; position; location; geographic region.
• topo-place, area or region
• topobathyunderwater topography; bathymetry.
• topographiaDescription of a place.
• toreuticRelating to toreutics.
• toreuticsThe art of making relief or intaglio designs, especially by chasing, carving or embossing in metal
• tormogenA specialized epidermal cell in insects, associated with the formation of the socket around the base of a bristle.
• toxarchThe captain of a group of archers in ancient Greece, particularly the mercenaries at Athens.
• toxarchesSynonym of toxarch.
• toxophilitePertaining to archery.
• toxotesAny fish of genus Toxotes, the archerfishes.
• trachelo-neck (structure connecting the head to the thorax)
• trachybasaltA volcanic rock with a composition between trachyte and basalt.
• trachyphoniahoarseness of the voice
• tragalismlustfulness
• tragomaschaliaA condition characterized by the smell of goats in the armpits, excessively stinky armpits.
• trapeziteA banker or money changer in Ancient Greece
• traulismA stammering or stuttering.
• trechometerodometer
• trepopneaDyspnea that is sensed while lying on one side but not on the other.
• triaconta-Thirty.
• triacontadSynonym of thirty, the number between 29 and 31.
• triaconterA vessel with thirty rows of oars for rowers.
• triadelphousHaving its stamens fused together at least partly by the filaments so that they form three separate groups, some of which may contain a lone stamen.
• triakis octahedronA Catalan solid with 24 isosceles triangle faces, 36 edges and 14 vertices, being the dual of the truncated cube.
• tribikosAn early distillation apparatus having three "beaks" to collect the distillate.
• tribo-friction
• tribosphenicDescribing the original placental molars that have a talonid in the lower molar teeth, where the protocone of the upper teeth hits. Definied by George Gaylord Simpson in 1936.
• tribrachA metrical foot consisting of three short syllables.
• tricerionA candlestick with three lights, signifying the Trinity.
• trichinaAny of several parasitic roundworms, of the genus Trichinella, that infect the intestines and cause trichinosis
• tricho-Forming words related to hair.
• trichoclasisA brittle condition of the hair.
• trichodragmaA sheaf or bundle of raphides.
• trichoepitheliomaA neoplasm of the adnexa of the skin
• trichogyneThe slender, hair-like cell which receives the fertilizing particles, or antherozoids, in female red algae, lichens and fungi.
• trichomaIngrown eyelash; trichiasis.
• trichomatoseAffected with trichoma (plica).
• trichoschisistrichoclasis, especially where the cuticle is locally absent at the site of fracture
• trichotomyDivision or separation into three groups or pieces.
• trichromacyThe quality of having three independent channels for conveying color information in the eye.
• tricolonA sentence with three clearly defined parts of equal length, usually independent clauses.
• tridactylHaving three digits on a limb.
• trietericSynonym of triennal (“related to or characterized by an three-year period”)
• triglyphA vertically channeled tablet of the Doric frieze.
• trigoneuticHaving three broods per season.
• trigononA small triangular harp.
• trikirionA liturgical candlestick holding three candles, used in the Eastern Orthodox and Eastern Catholic Churches.
• trilabeA three-pronged surgical instrument for removing calculi from the bladder.
• trilithonA structure consisting of two stone pillars supporting a horizontal stone.
• trimerousOrganized in threes; having parts in numbers that are multiples of three.
• trinacriformHaving three prongs or sharp points.
• TriodionThe liturgical book used by the Eastern Orthodox Church, containing the propers for the fasting period preceding Easter and for the weeks leading up to the fast.
• triphthongA monosyllabic vowel combination usually involving a quick but smooth movement from one vowel to another that passes over a third one.
• tripodyThree metrical feet taken together, or included in one measure.
• TripolitaniaA historic region and former province in western Libya, centered around the coastal city of Tripoli.
• -tripsyUsed to form nouns referring to a surgical procedure involving the crushing, breaking, rubbing, or pulverization of a substance (especially a calculus or stone).
• triptonThe inorganic particulate matter suspended in bodies of water such as lakes and seas.
• tris-A variant of tri- used to indicate that the component that does not take the prefix occurs three times in the compound: trisphosphuret of copper is PCu₃; trisbenzeneazoresorcinol, C₆H(OH)₂(N₂Ph)₃.
• triskaideka-thirteen
• tris legomenonA word occurring only three times in a given corpus.
• trispastA machine with three pulleys which act together to raise great weights.
• tritideA hydride using tritium.
• tritrophicDescribing a parasite that feeds on another parasite that feeds on a third parasite.
• trittysA subdivision of ancient Attica
• troadThe Biga peninsula in the northwestern part of Anatolia, Turkey.
• trochalResembling a wheel.
• trochilicOf or pertaining to rotary motion or to wheels
• trochilicsThe science of rotary motion, or work done with wheels.
• trocho-wheel
• trochoidThe curve traced by a point on a circle as it rolls along a straight line
• troglo-cave
• trogloxeneAny organism which sporadically lives in underground habitats such as caves, and cannot live there exclusively.
• tromometerAn instrument for measuring slight earthquake shocks.
• -tronUsed to name various electronic and neutronic devices.
• tropaionAn ancient Greek or Roman monument set up to commemorate a victory over foes, and typically shaped like a tree, sometimes with a pair of arm-like branches.
• -trophForming nouns denoting members of classes of organisms distinguished by trophic modes.
• -trophicUsed to form adjectives corresponding to nouns ending in -trophy
• tropho-nourish; nourishment.
• trophospermThe placenta.
• -trophynutrition
• -tropiaturning, movement; identical in origin to -tropy but more commonly associated with medicine, especially eye conditions.
• -tropicTurning or changing.
• tropo-Characterized by or related to turning motion.
• trymaA drupe with fleshy exocarp, dehiscent, such as the walnut.
• trypano-trypanosome
• TryphosaName of a Christian woman mentioned in the Bible.
• trypographAn early machine for printing by the use of paper stencils.
• trypophobiaAn irrational or obsessive fear of irregular patterns or clusters of small holes, such as those found in honeycombs.
• turophileA gourmet/connoisseur of cheese.
• TybiThe fifth month of the later ancient Egyptian civil calendar and Coptic calendar, corresponding to the first month of the season of Peret. Since 25 BCE, when the calendar was reformed to include leap-days, Tybi has been in roughly January.
• tychismA theory suggesting that absolute chance, or indeterminism, is a real factor operative in the universe.
• tychoparthenogenesisparthenogenesis in a species that normally reproduces normally (typically a weevil)