Webster's Revised Unabridged Dictionary · 1913

Indazole

Indazole , noun

[Indol + azote.]

(Chemistry) 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.