TETRAGYNIA Tet`ra*gyn"i*a, n. pl. Etym: [NL., fr. Gr. te`tra- (see Tetra-) + gynh` a woman, female.] (Bot.)
Defn: A Linnæan order of plants having four styles.
TETRAGYNIAN; TETRAGYNOUS
Tet`ra*gyn"i*an, Te*trag"y*nous, a. (Bot.)
Defn: Belonging to the order Tetragynia; having four styles.
TETRAHEDRAL
Tet`ra*he"dral, a. Etym: [See Tetrahedron.]
1. Having, or composed of, four sides.
2. (Crystallog.) (a) Having the form of the regular tetrahedron. (b) Pertaining or related to a tetrahedron, or to the system of hemihedral forms to which the tetrahedron belongs. Tetrahedral angle (Geom.), a solid angle bounded or inclosed by four plane angles.
TETRAHEDRALLY
Tet`ra*he"dral*ly, adv.
Defn: In a tetrahedral manner.
TETRAHEDRITE Tet`ra*he"drite, n. Etym: [So called because the crystals of the species are commonly tetrahedrons.] (Min.)