Webster's Dictionary, 1913

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Tetrapharmacom, Tetrapharmacum noun [ New Latin tetrapharmacon , Latin tetrapharmacum , Greek ...; te`tra- (see Tetra- ) + ... a drug.] (Medicine) A combination of wax, resin, lard, and pitch, composing an ointment. Brande & C.

Tetraphenol noun [ Tetra- + phenol .] (Chemistry) Furfuran. [ Obsolete]

Tetraphyllous adjective [ Tetra- + Greek ... a leaf.] (Botany) Having four leaves; consisting of four distinct leaves or leaflets.

Tetrapla noun ; etymologically plural , but syntactically sing. [ New Latin , from Greek tetraplo`os , tetraploy^s , fourfold.] A Bible consisting of four different Greek versions arranged in four columns by Origen; hence, any version in four languages or four columns.

Tetrapneumona noun plural [ New Latin See Tetra- , and Pneumo- .] (Zoology) A division of Arachnida including those spiders which have four lungs, or pulmonary sacs. It includes the bird spiders (Mygale) and the trapdoor spiders. See Mygale .

Tetrapnuemonian noun (Zoology) One of the Tetrapneumona.

Tetrapod noun [ Greek ... fourfooted; te`tra- (see Tetra- ) + ..., ..., foot.] (Zoology) An insect characterized by having but four perfect legs, as certain of the butterflies.

Tetrapody noun [ Greek ....] A set of four feet; a measure or distance of four feet.

Tetrapteran noun [ See Tetrapterous .] (Zoology) An insect having four wings.

Tetrapterous adjective [ Greek ...; te`tra- (see Tetra- ) + ... wing.] (Zoology) Having four wings.

Tetraptote noun [ Latin tetraptotum , Greek ....] (Gram.) A noun that has four cases only. Andrews.

Tetrarch noun [ Latin tetrarches , Greek ..., ...; te`tra- (see Tetra- ) + ... a ruler, ... to lead; rule: confer French tétrarque . See Arch , adjective ] (Rom. Antiq.) A Roman governor of the fourth part of a province; hence, any subordinate or dependent prince; also, a petty king or sovereign.

Tetrarch adjective Four. [ Obsolete] Fuller.

Tetrarchate noun [ Confer French tétrarchat .] (Rom. Antiq.) A tetrarchy.

Tetrarchical adjective [ Greek ....] Of or pertaining to a tetrarch or tetrarchy. Bolingbroke.

Tetrarchy noun ; plural Tetrarchies . [ Latin tetrarchia , Greek ...: confer French tétrarchie .] (Rom. Antiq.) The district under a Roman tetrarch; the office or jurisdiction of a tetrarch; a tetrarchate.

Tetraschistic adjective [ Greek ... divided into four parts; te`tra- tetra- + ... to split.] (Biol.) Characterized by division into four parts.

Tetrasepalous adjective [ Tetra- + sepal .] (Botany) Having four sepals.

Tetraspaston noun [ New Latin , from Greek te`tra- (see Tetra- ) + ... to draw, pull.] (Machinery) A machine in which four pulleys act together. Brande & C.

Tetraspermous adjective [ Tetra- + Greek ... a seed.] (Botany) Having four seeds.

Tetraspermous plant , a plant which produces four seeds in each flower.

Tetraspore noun [ Tetra- + spore .] (Botany) A nonsexual spore, one of a group of four regularly occurring in red seaweeds. -- Tet`ra*spor"ic adjective

Tetrastich noun [ Latin tetrastichon , Greek ...; te`tra- (see Tetra- ) + ... a row, verse.] A stanza, epigram, or poem, consisting of four verses or lines. Pope.

Tetrastyle adjective [ Latin tetrastylon , Greek ... with four pillars in front; te`tra- (see Tetra- ) + ... a column.] (Architecture) Having four columns in front; -- said of a temple, portico, or colonnade. -- noun A tetrastyle building.

Tetrasyllabic, Tetrasyllabical adjective [ Confer French tétrasyllabique .] Consisting of, or having, four syllables; quadrisyllabic.

Tetrasyllable noun [ Tetra- + syllable : confer Greek ... of four syllables.] A word consisting of four syllables; a quadrisyllable.

Tetrathecal adjective [ Tetra- + thecal .] (Botany) Having four loculaments, or thecæ.

Tetrathionate noun (Chemistry) A salt of tetrathionic acid.

Tetrathionic adjective [ Tetra- + thionic .] (Chemistry) Of, pertaining to, or designating, a thionic derivative, H 2 S 4 O 6 , of sulphuric acid, obtained as a colorless, odorless liquid.

Tetratomic adjective [ Tetra- + atomic .] (Chemistry) (a) Consisting of four atoms; having four atoms in the molecule, as phosphorus and arsenic. (b) Having a valence of four; quadrivalent; tetravalent; sometimes, in a specific sense, having four hydroxyl groups, whether acid or basic.

Tetravalence noun (Chemistry) The quality or state of being tetravalent; quadrivalence.

Tetravalent adjective [ Tetra- + Latin valens , -entis , present participle] (Chemistry) Having a valence of four; tetratomic; quadrivalent.

Tetraxile adjective [ Tetra- + axile .] (Zoology) Having four branches diverging at right angles; -- said of certain spicules of sponges.

Tetrazine noun Also -in [ Tetrazo- + -ine .] (Chemistry) A hypothetical compound, C 2 H 2 N 4 which may be regarded as benzene with four CH groups replaced by nitrogen atoms; also, any of various derivatives of the same. There are three isomeric varieties.

Tetrazo- adjective [ Tetra- + azo- .] (Chemistry) A combining form (also used adjectively), designating any one of a series of double derivatives of the azo and diazo compounds containing four atoms of nitrogen .

Tetrazole noun [ Tetrazo- + -ole .] (Org. Chem.) A crystalline acid substance, CH 2 N 4 , which may be regarded as pyrrol in which nitrogen atoms replace three CH groups; also, any of various derivatives of the same.

Tetrazone noun (Chemistry) Any one of a certain series of basic compounds containing a chain of four nitrogen atoms; for example, ethyl tetrazone , (C 2 H 5 ) 2 N. N 2 .N(C 2 H 5 ) 2 , a colorless liquid having an odor of leeks.

Tetric, Tetrical adjective [ Latin tetricus , taetricus, from teter , taeter , offensive, foul.] Forward; perverse; harsh; sour; rugged. [ Obsolete] -- Tet"ric*al*ness , noun

Tetricity noun [ Latin tetricitas , taetricitas .] Crabbedness; perverseness. [ Obsolete]

Tetricous adjective Tetric. [ Obsolete]

Tetrinic adjective [ See Tetra- .] (Chemistry) Of, pertaining to, or designating, a complex ketonic acid, C 5 H 6 O 3 , obtained as a white crystalline substance; -- so called because once supposed to contain a peculiar radical of four carbon atoms. Called also acetyl-acrylic acid .

Tetrodon noun [ Tetra- + Greek ..., ..., tooth.] (Zoology) Any one of numerous species of plectognath fishes belonging to Tetrodon and allied genera. Each jaw is furnished with two large, thick, beaklike, bony teeth. [ Written also tetradon .]

» The skin is usually spinous, and the belly is capable of being greatly distended by air or water. It includes the swellfish, puffer (a) , and similar species.

Tetrodont adjective (Zoology) Of or pertaining to the tetrodons. -- noun A tetrodon. [ Written also tetradont , and tetraodont .]

Tetrol noun [ Tetra- + benz ol .] (Chemistry) A hypothetical hydrocarbon, C 4 H 4 , analogous to benzene; -- so called from the four carbon atoms in the molecule.

Tetrol phenol , furfuran. [ Obsolete]

Tetrolic adjective (Chemistry) Of, pertaining to, or designating, an acid, C 3 H 3 .CO 2 H, of the acetylene series, homologous with propiolic acid, obtained as a white crystalline substance.

Tetrose noun [ Tetra- + - ose .] (Chemistry) A monosaccharide derived from a certain alcohol.

Tetroxide noun [ Tetr a- + oxide .] (Chemistry) An oxide having four atoms of oxygen in the molecule; a quadroxide; as, osmium tetroxide , OsO....

Tetryl noun [ Tetr a- + -yl .] (Chemistry) Butyl; -- so called from the four carbon atoms in the molecule.

Tetrylene noun [ Tetr a- + eth ylene .] (Chemistry) Butylene; -- so called from the four carbon atoms in the molecule.

Tetter noun [ Middle English teter , Anglo-Saxon teter , tetr ; akin to German zitter , zitter mal, Old High German zittar och, Sanskrit dadru , dadruka , a sort of skin disease. √63, 240.] (Medicine) A vesicular disease of the skin; herpes. See Herpes .

Honeycomb tetter (Medicine) , favus. -- Moist tetter (Medicine) , eczema. -- Scaly tetter (Medicine) , psoriasis. -- Tetter berry (Botany) , the white bryony.

Tetter transitive verb [ imperfect & past participle Tettered ; present participle & verbal noun Tettering .] To affect with tetter. Shak.