GNU Collaborative International Dictionary of English

Found one definition

1.       
   Indazole (?), n. [Indol + azote.] (Chem.) A bicyclic nitrogenous compound, C7H6N2, analogous to indole, having a benzene ring fused to a pyrazole ring; called also indazol and benzopyrazole.  It can be produced from a diazo derivative of cinnamic acid.
   
   [1913 Webster +PJC]