Defn: Capable of neutralizing four molecules of a monacid base; having four hydrogen atoms capable of replacement by bases; quadribasic; — said of certain acids; thus, normal silicic acid, Si(OH)4, is a tetrabasic acid.
TETRABORIC
Tet`ra*bor"ic, a. Etym: [Tetra- + boric.] (Chem.)
Defn: Same as Pyroboric.
TETRABRANCHIATA
Tet`ra*bran`chi*a"ta, n. pl. Etym: [NL. See Tetra-, and Branchia.]
(Zoöl.)
Defn: An order of Cephalopoda having four gills. Among living species it includes only the pearly nautilus. Numerous genera and species are found in the fossil state, such as Ammonites, Baculites, Orthoceras, etc.
TETRABRANCHIATE
Tet`ra*bran`chi*ate, a. Etym: [Tetra + branchiate.] (Zoöl.)
Defn: Of or pertaining to the Tetrabranchiata.
— n.
Defn: One of the Tetrabranchiata.
TETRACARPEL
Tet`ra*car"pel, a. Etym: [Tetra- + carpellary.] (Bot.)
Defn: Composed of four carpels.