TETRADYNAMIA
Tet`ra*dy*na"mi*a, n. pl. Etym: [NL., fr. Gr. Tetra-) + (Bot.)
Defn: A Linnæan class of plants having six stamens, four of which are longer than the others.
TETRADYNAMIAN
Tet`ra*dy*na"mi*an, n. (Bot.)
Defn: A plant of the order Tetradynamia.
TETRADYNAMIAN; TETRADYNAMOUS
Tet`ra*dy*na"mi*an, Tet`ra*dyn"a*mous, a. (Bot.)
Defn: Belonging to the order Tetradynamia; having six stamens, four of which are uniformly longer than the others.
TETRAGON
Tet"ra*gon, n. Etym: [L. tetragonum, Gr. Tetra-) + tétragone.]
1. (Geom.)
Defn: A plane figure having four sides and angles; a quadrangle, as a square, a rhombus, etc.
2. (Astrol.)