Tetradecapod, tet-ra-dek′a-pod, adj. having fourteen feet.—n.pl. Tetradecap′oda, fourteen-footed crustaceans.—adj. Tetradecap′odous.

Tetragamy, te-trag′a-mi, n. marriage for the fourth time. [Gr., tetra-, four, gamos, marriage.]

Tetragon, tet′ra-gon, n. a figure of four angles.—adj. Tetrag′onal. [Gr. tetragonontetra-, four gōnia, an angle.]

Tetragram, tet′ra-gram, n. a word of four letters: the Tetragrammaton: (geom.) a quadrilateral.—n. Tetragram′maton, the name JeHoVaH as written with four Hebrew letters, regarded as a mystic symbol: similarly some other sacred word of four letters, as the Latin Deus. [Gr., tetra-, four, gramma, a letter.]

Tetragynous, tet-raj′i-nus, adj. (bot.) having four styles or pistils—also Tetragyn′ian.—n.pl. Tetragyn′ia.

Tetrahedron, tet-ra-hē′dron, n. a solid figure enclosed by four bases or triangles.—adjs. Tetrahē′dral, having four sides: bounded by four triangles; Tetrahexahē′dral.—n. Tetrahex′ahēdron, a solid of twenty-four triangular faces. [Gr., tetra-, four, hedra, a base.]

Tetralogy, te-tral′ō-ji, n. a group of four dramas, three tragic and one satiric, exhibited together at the festivals of Dionysos at Athens: any series of four related dramatic or operatic works.

Tetramera, te-tram′e-ra, n.pl. a division of beetles with four-jointed tarsi.—adj. Tetram′eral, four-parted.—n. Tetram′erism, division into four parts.—adj. Tetram′erous, having four parts. [Gr., tetra-, four, meros, part.]

Tetrameter, te-tram′e-tėr, adj. having four measures, each of two iambic or trochaic feet.—n. a verse of four measures. [Gr. tetrametrostetra-, four, metron, measure.]