TETRAZINE; TETRAZIN
Tet*raz"ine, n. Also -in. [Tetrazo- + -ine.] (Chem.)
Defn: A hypothetical compound, C2H2N4 which may be regarded as benzene with four CH groups replaced by nitrogen atoms; also, any of various derivatives of the same. There are three isomeric varieties.
TETRAZO-
Tet*raz"o-, a. Etym: [Tetra- + azo-.] (Chem.)
Defn: A combining form (also used adjectively), designating any one of a series of double derivatives of the azo and diazo compounds containing four atoms of nitrogen.
TETRAZOLE
Tet*raz"ole, n. [Tetrazo- + -ole.] (Org. Chem.)
Defn: A crystalline acid substance, CH2N4, which may be regarded as pyrrol in which nitrogen atoms replace three CH groups; also, any of various derivatives of the same.
TETRAZONE
Tet"ra*zone, n. (Chem.)
Defn: Any one of a certain series of basic compounds containing a chain of four nitrogen atoms; for example, ethyl tetrazone, (C2H5)2N.N2.N(C2H5)2, a colorless liquid having an odor of leeks.
TETRIC; TETRICAL Tet"ric, Tet"ri*cal, a. Etym: [L. tetricus, taetricus, from teter, taeter, offensive, foul.]
Defn: Forward; perverse; harsh; sour; rugged. [Obs.] —
Tet"ric*al*ness, n.