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Tristoma

Any one of numerous species of trematode worms belonging to Tristoma and allied genera having a large posterior sucker and two small anterior ones. They usually have broad, thin, and disklike bodies, and are parasite on the gills and skin of fishes.

Trisulc

Something having three forks or prongs, as a trident.

Trisulcate

Having three furrows, forks, or prongs; having three grooves or sulci; three-grooved.

Trisulphide

A sulphide containing three atoms of sulphur.

Trisyllabical Trisyllabic

Of or pertaining to a trisyllable; consisting of three syllables; as, /syllable/ is a trisyllabic word.

Trisyllable

A word consisting of three syllables only; as, a-ven-ger.

Trite

Worn out; common; used until so common as to have lost novelty and interest; hackneyed; stale; as, a trite remark; a trite subject.

Triternate

Three times ternate; -- applied to a leaf whose petiole separates into three branches, each of which divides into three parts which each bear three leafiets.

Tritheism

The opinion or doctrine that the Father, Son, and Holy Spirit are three distinct Gods.

Trithing

One of three ancient divisions of a county in England; -- now called riding.

Trithionic

Of or pertaining to, or designating, a certain thionic acid, H2S3O6 which is obtained as a colorless, odorless liquid.

Tritiated

containing tritium; -- of chemical compounds; as, tritiated thymine.

Triticin

A carbohydrate isomeric with dextrin, obtained from quitch grass (Agropyrum repens, formerly Triticum repens) as a white amorphous substance.

Triticum

A genus of grasses including the various species of wheat.

tritium

A radioactive isotope of hydrogen having one proton and two neutrons in the nucleus. It decays spontaneously to Helium-3 by the emission of an electron (beta ray), with a half-life of 12.3 years. Symbol 1H3. Atomic weight 3.01605 (C-12 = 12.0000). It is one of the radioisotopes commonly used to label chemical compounds for use as tracers in biochemistry and chemistry. It is also used as one of the fusionable components of a hydrogen bomb.

Triton

A fabled sea demigod, the son of Neptune and Amphitrite, and the trumpeter of Neptune. He is represented by poets and painters as having the upper part of his body like that of a man, and the lower part like that of a fish. He often has a trumpet made of a shell.

Tritone

A superfluous or augmented fourth.

Tritovum

An embryonic insect which has twice cast its skin previous to hatching from the egg.

Tritozooid

A zooid of the third generation in asexual reproduction.

Tritubercular

Having or designating teeth with three cusps or tubercles; tricuspid. Pertaining to trituberculy.

Trituberculy

A theory of the development of mammalian molar teeth. The primitive stage is that of simple cones, as in reptiles. The simple cone then developed a smaller cone in front and another behind. Next, a cingulum was developed, and the three cones became arranged in a triangle, the two smaller cusps having moved to the outer side in upper and to the inner in lower molars. This primitive triangle is called the trigon or trigonid and this stage the tritubercular or trigonodont. The trigon being a cutting apparatus, an extension of the posterior part of the crown was developed in lower molars for crushing, and a smaller corresponding part appeared in upper molars. Another large cone then arose, usually from the cingulum. In more complex forms, smaller intermediate cusps appeared.

Trituration

The act of triturating, or reducing to a fine or impalpable powder by grinding, rubbing, bruising, etc.

Triture

A rubbing or grinding; trituration.

Triturium

A vessel for separating liquids of different densities.

Triumph

To obtain a victory over; to prevail over; to conquer. Also, to cause to triumph.

Triumpher

One who was honored with a triumph; a victor.

Triumphing

Having or celebrating a triumph; victorious; triumphant.

Triumvir

One of tree men united in public office or authority.

Triumvirate

Government by three in coalition or association; the term of such a government.

Triune

Being three in one; -- an epithet used to express the unity of a trinity of persons in the Godhead.

Triungulus

The active young larva of any oil beetle. It has feet armed with three claws, and is parasitic on bees. See Illust. of Oil beetle, under Oil.

Triunity

The quality or state of being triune; trinity.

Trivalence

The quality or state of being trivalent.

Trivalent

Having a valence of three; capable of being combined with, substituted for, or compared with, three atoms of hydrogen; -- said of triad atoms or radicals; thus, nitrogen is trivalent in ammonia.

Trivalve

Anything having three valves, especially a shell.

Triverbial

Pertaining to, or designating, certain days allowed to the pretor for hearing causes, when be might speak the three characteristic words of his office, do, dico, addico. They were called dies fasti.

Trivet

A tree-legged stool, table, or other support; especially, a stand to hold a kettle or similar vessel near the fire; a tripod.

Trivial

One of the three liberal arts forming the trivium.

Trivialism

A trivial matter or method; a triviality.

Triviality

The quality or state of being trivial; trivialness.

Trivium

The three / liberal/ arts, grammar, logic, and rhetoric; -- being a triple way, as it were, to eloquence.

Triweekly

Occurring or appearing three times a week; thriceweekly; as, a triweekly newspaper. Three times a week. A triweekly publication.

Troat

The cry of a buck in rutting time.

Trocar

A stylet, usually with a triangular point, used for exploring tissues or for inserting drainage tubes, as in dropsy.

Trocha

A line of fortifications, usually rough, constructed to prevent the passage of an enemy across a region.

Trochaical Trochaic

Of or pertaining to trochees; consisting of trochees; as, trochaic measure or verse.

Trochanter

One of two processes near the head of the femur, the outer being called the great trochanter, and the inner the small trochanter.

Trochanteric

Of or pertaining to one or both of the trochanters.

Trochantine

The second joint of the leg of an insect, -- often united with the coxa.

Troche

A medicinal tablet or lozenge; strictly, one of circular form.

Trochee

A foot of two syllables, the first long and the second short, as in the Latin word ante, or the first accented and the second unaccented, as in the English word motion; a choreus.

Trochili

A division of birds comprising the humming birds.

Trochilic

OF or pertaining to rotary motion; having power to draw out or turn round.

Trochilics

The science of rotary motion, or of wheel work.

Trochilidist

One who studies, or is versed in, the nature and habits of humming birds, or the Trochilidae.

Trochilus

A genus of humming birds. It Formerly included all the known species. Any one of several species of wrens and kinglets. The crocodile bird.

Troching

One of the small branches of a stag's antler.

Trochite

A wheel-like joint of the stem of a fossil crinoid.

Trochlear

Shaped like, or resembling, a pulley; pertaining to, or connected with, a trochlea; as, a trochlear articular surface; the trochlear muscle of the eye.

Trochleary

Pertaining to, or connected with, a trochlea; trochlear; as, the trochleary, or trochlear, nerve.

Trochoid

Admitting of rotation on an axis; -- sometimes applied to a pivot joint like that between the atlas and axis in the vertebral column.

Trochoidal

Of or pertaining to a trochoid; having the properties of a trochoid.

Trochometer

A contrivance for computing the revolutions of a wheel; an odometer.

Trochosphere

A young larval form of many annelids, mollusks, and bryozoans, in which a circle of cilia is developed around the anterior end.

Trochus

Any one of numerous species of marine univalve shells belonging to Trochus and many allied genera of the family Trochidae. Some of the species are called also topshells.

Troco

An old English game; -- called also lawn billiards.

Trod

imp. p. p. of Tread.

Troglodyte

One of any savage race that dwells in caves, instead of constructing dwellings; a cave dweller, or cave man. Most of the primitive races of man were troglodytes.

Trogon

Any one of numerous species of beautiful tropical birds belonging to the family Trogonidae. They are noted for the brilliant colors and the resplendent luster of their plumage.

Trogue

A wooden trough, forming a drain.

Troic

Pertaining to Troy; Trojan.

Troilite

Native iron protosulphide, FeS. It is known only in meteoric irons, and is usually in imbedded nodular masses of a bronze color.

Troilus

A large, handsome American butterfly (Euph/ades troilus, or Papilio troilus). It is black, with yellow marginal spots on the front wings, and blue spots on the rear wings; -- also called troilus butterfly.

Trojan

Of or pertaining to ancient Troy or its inhabitants. A native or inhabitant of Troy.

Trojan horse

a large hollow wooden horse built by Greek soldiers besieging Troy during the Trojan War, and left as a /gift/ when they pretended to abandon their seige. It was taken into the city by the Trojans, and Greek soldiers concealed inside came out and opened the gates to the city, enabling the capture of the city by the Greeks.

Troll

The act of moving round; routine; repetition.

Trollop

A stroller; a loiterer; esp., an idle, untidy woman; a slattern; a slut; a whore.

Trolly Trolley

A form of truck which can be tilted, for carrying railroad materials, or the like. A narrow cart that is pushed by hand or drawn by an animal. A truck from which the load is suspended in some kinds of cranes. A truck which travels along the fixed conductors, and forms a means of connection between them and a railway car.

Trombone

A powerful brass instrument of the trumpet kind, thought by some to be the ancient sackbut, consisting of a tube in three parts, bent twice upon itself and ending in a bell. The middle part, bent double, slips into the outer parts, as in a telescope, so that by change of the vibrating length any tone within the compass of the instrument (which may be bass or tenor or alto or even, in rare instances, soprano) is commanded. It is the only member of the family of wind instruments whose scale, both diatonic and chromatic, is complete without the aid of keys or pistons, and which can slide from note to note as smoothly as the human voice or a violin. Softly blown, it has a rich and mellow sound, which becomes harsh and blatant when the tones are forced; used with discretion, its effect is often solemn and majestic.

Trommel

A revolving buddle or sieve for separating, or sizing, ores.

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