Te*trarch"ate (?), n. [Cf. F. tétrarchat.] (Rom. Antiq.) A tetrarchy.
Te*trarch"ic*al (?), a. [Gr. &?;.] Of or pertaining to a tetrarch or tetrarchy. Bolingbroke.
Tet"rarch*y (?), n.; pl. Tetrarchies (#). [L. tetrarchia, Gr. &?;: cf. F. tétrarchie.] (Rom. Antiq.) The district under a Roman tetrarch; the office or jurisdiction of a tetrarch; a tetrarchate.
Tet`ra*schis"tic (?), a. [Gr. &?; divided into four parts; te`tra- tetra- + &?; to split.] (Biol.) Characterized by division into four parts.
Tet`ra*sep"al*ous (?), a. [Tetra- + sepal.] (Bot.) Having four sepals.
Tet`ra*spas"ton (?), n. [NL., fr. Gr. te`tra- (see Tetra-) + &?; to draw, pull.] (Mach.) A machine in which four pulleys act together. Brande & C.
Tet`ra*sper"mous (?), a. [Tetra- + Gr. &?; a seed.] (Bot.) Having four seeds.
Tetraspermous plant, a plant which produces four seeds in each flower.
Tet"ra*spore (?), n. [Tetra- + spore.] (Bot.) A nonsexual spore, one of a group of four regularly occurring in red seaweeds. — Tet`ra*spor"ic (#), a.
Te*tras"tich (?), n. [L. tetrastichon, Gr. &?;; te`tra- (see Tetra-) + &?; a row, verse.] A stanza, epigram, or poem, consisting of four verses or lines. Pope.
Tet"ra*style (?), a. [L. tetrastylon, Gr. &?; with four pillars in front; te`tra- (see Tetra-) + &?; a column.] (Arch.) Having four columns in front; — said of a temple, portico, or colonnade. — n. A tetrastyle building.
{ Tet`ra*syl*lab"ic (?), Tet`ra*syl*lab"ic*al (?), } a. [Cf. F. tétrasyllabique.] Consisting of, or having, four syllables; quadrisyllabic.
Tet"ra*syl`la*ble (?), n. [Tetra- + syllable: cf. Gr. &?; of four syllables.] A word consisting of four syllables; a quadrisyllable.
Tet`ra*the"cal (?), a. [Tetra- + thecal.] (Bot.) Having four loculaments, or thecæ.
Tet`ra*thi"on*ate (?), n. (Chem.) A salt of tetrathionic acid.
Tet`ra*thi*on"ic (?), a. [Tetra- + thionic.] (Chem.) Of, pertaining to, or designating, a thionic derivative, H2S4O6, of sulphuric acid, obtained as a colorless, odorless liquid.
Tet`ra*tom"ic (?), a. [Tetra- + atomic.] (Chem.) (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.