Tetrazine \Tet*raz"ine\, n. Also -in \-in\ . [Tetrazo- + -ine.]
(Chem.)
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.
[Webster 1913 Suppl.]