What is "cinnoline"

Cinnoline \Cin"no*line\, n. [Cinnamic + quinoline.] A nitrogenous organic base, C8H6N2, analogous to quinoline, obtained from certain complex diazo compounds.

n. (context organic compound English) benzopyridazine

Cinnoline is an aromatic heterocyclic compound with the formula CHN. It is isomeric with other naphthyridines including quinoxaline, phthalazine and quinazoline.