TETRICITY
Te*tric"i*ty, n. Etym: [L. tetricitas, taetricitas.]
Defn: Crabbedness; perverseness. [Obs.]
TETRICOUS
Tet"ric*ous, a.
Defn: Tetric. [Obs.]
TETRINIC
Te*trin"ic, a. Etym: [See Tetra-.] (Chem.)
Defn: Of, pertaining to, or designating, a complex ketonic acid, C5H6O3, obtained as a white crystalline substance; — so called because once supposed to contain a peculiar radical of four carbon atoms. Called also acetyl-acrylic acid.
TETRODON
Tet"ro*don, n. Etym: [Tetra- + Gr. (Zoöl.)
Defn: Any one of numerous species of plectognath fishes belonging to Tetrodon and allied genera. Each jaw is furnished with two large, thick, beaklike, bony teeth. [Written also tetradon.]
Note: The skin is usually spinous, and the belly is capable of being greatly distended by air or water. It includes the swellfish, puffer (a), and similar species.
TETRODONT
Tet"ro*dont, a. (Zoöl.)