any organic compound whose molecules contain a pentagonal ring of three carbon atoms and two nitrogen atoms, esp imidazole (1,3-diazole) or pyrazole (1,1–diazole)
diazole in American English
(ˈdaɪəˌzoʊl; daɪˈæzˌoʊl)
noun
1.
any of a group of chemical compounds with a 5-membered ring containing three atoms of carbon and two of nitrogen