Wiktionary
benzimidazole
n. (context organic compound English) A bicyclic heterocycle containing a benzene ring fused to that of imidazole; it is used as a pesticide.
Wikipedia
Benzimidazole
Benzimidazole is a heterocyclic aromatic organic compound. This bicyclic compound consists of the fusion of benzene and imidazole. It is a colorless solid.