Webster's Dictionary 1913

1648

Tethyodea

‖Te′thy‐o″de‐a (?), n. pl. [NL., fr. Tethys + Gr. � form.] (Zoöl.) A division of Tunicata including the common attached ascidians, both simple and compound. Called also Tethioidea.

1649

Tethys

Te″thys (?), n.(Zoöl.) A genus of a large naked mollusks having a very large, broad, fringed cephalic disk, and branched dorsal gills. Some of the species become a foot long and...

1650

Tetra-

Tet″ra– (?). [Gr. τέτρα-, from τέσαρεσ, τέτταρεσ, four. See Four.] 1. A combining form or prefix signifying four, as in tetrabasic, tetrapetalous.2. (Chem.) A combining form (al...

1651

Tetrabasic

Tet′ra‐bas″ic (?), a. [Tetra- + basic.] (Chem.) Capable of neutralizing four molecules of a monacid base; having four hydrogen atoms capable of replacement by bases; quadribasic...

1652

Tetraboric

Tet′ra‐bor″ic (?), a. [Tetra- + boric.] (Chem.) Same as Pyroboric.

1653

Tetrabranchiata

‖Tet′ra‐bran′chi‐a″ta (?), n. pl. [NL. See Tetra-, and Branchia.] (Zoöl.) An order of Cephalopoda having four gills. Among living species it includes only the pearly nautilus. N...

1654

Tetrabranchiate

Tet′ra‐bran′chi‐ate (?), a. [Tetra + branchiate.] (Zoöl.) Of or pertaining to the Tetrabranchiata. — n. One of the Tetrabranchiata.

1655

Tetracarpel

Tet′ra‐car″pel (?), a. [Tetra- + carpellary.] (Bot.) Composed of four carpels.

1656

Tetrachord

Tet″ra‐chord (?), n. [L. tetrachordon, Gr. �, from � four-stringed; τέτρα- (see Tetra-) + � a chord: cf. F. tétrachorde.] (Anc. Mus.) A scale series of four sounds, of which the...

1657

Tetrachotomous

Tet′ra‐chot″o‐mous (?), a. [Gr. τέτραχα in four parts + τέμνειν to cut.] (Bot.) Having a division by fours; separated into four parts or series, or into series of fours.

1658

Tetracid

Tet‐rac″id (?), a. [Tetra + acid.] (Chem.) Capable of neutralizing four molecules of a monobasic acid; having four hydrogen atoms capable of replacement ba acids or acid atoms; ...

1659

Tetracoccous

Tet′ra‐coc″cous (?), a. [See Tetra-, and Coccus.] (Bot.) Having four cocci, or carpels.

1660

Tetracolon

Tet′ra‐co″lon (?), n. [Gr. � with four members; τέτρα- (see Tetra-) + � limb, member.] (Pros.) A stanza or division in lyric poetry, consisting of four verses or lines. Crabb.

1661

Tetracoralla

‖Te′tra‐co‐ral″la (?), n. pl. [NL. See Tetra-, and Corallum.] (Paleon.) Same as Rugosa.

1662

Tetractinellid

Te‐trac′ti‐nel″lid (?), n.(Zoöl.) Any species of sponge of the division Tetractinellida. Also used adjectively.

1663

Tetractinellida

‖Te‐trac′ti‐nel″li‐da (?), n. pl. [NL., from Gr. τέτρα- tetra- + �, �, ray, spoke.] (Zoöl.) A division of Spongiæ in which the spicules are siliceous and have four branches dive...

1664

Tetrad

Tet″rad (?), n. [L. tetras, -adis, Gr. �, �: cf. F. tétrade.] 1. The number four; a collection of four things; a quaternion.2. (Chem.) A tetravalent or quadrivalent atom or radi...

1665

Tetradactyl

{ Tet′ra‐dac″tyl, Tet′ra‐dac″tyle } (?), a. [Cf. F. tétradactyle.] (Zoöl.) Tetradactylous.

1666

Tetradactylous

Tet′ra‐dac″tyl‐ous (?), a. [Gr. �; τέτρα- (see Tetra-) + � finger, toe.] (Zoöl.) Having, or characterized by, four digits to the foot or hand.

1667

Tetradecane

Tet′ra‐dec″ane (?), n. [Tetra- + Gr. � ten.] (Chem.) A light oily hydrocarbon, C14H30, of the marsh-gas series; — so called from the fourteen carbon atoms in the molecule.

1668

Tetradecapoda

‖Tet′ra‐de‐cap″o‐da (?), n. pl. [NL. See Tetra-, and Decapoda.] (Zoöl.) Same as Arthrostraca.

1669

Tetradic

Tet‐rad″ic (?), a.(Chem.) Of or pertaining to a tetrad; possessing or having the characteristics of a tetrad; as, a carbon is a tetradic element.

1670

Tetradite

Tet″ra‐dite (?), n. [See Tetrad.] A person in some way remarkable with regard to the number four, as one born on the fourth day of the month, or one who reverenced four persons ...

1671

Tetradon

Tet″ra‐don (?), n.(Zoöl.) See Tetrodon.

1672

Tetradont

Tet″ra‐dont (?), a. & n.(Zoöl.) See Tetrodont.

1673

Tetradrachm

{ Tet″ra‐drachm (?), ‖Tet′ra‐drach″ma (?), } n. [NL. tetradrachma, fr. Gr. τετράδραχμον; τέτρα- (see Tetra-) + δραχμή drachm, drachma.] A silver coin among the ancient Greeks, o...

1674

Tetradymite

Tet‐rad″y‐mite (?), n. [Gr. τετράδυμοσ fourfold. So named from its occurrence in compound twin crystals, or fourlings.] (Min.) A telluride of bismuth. It is of a pale steel-gray...