ˈpirəˌzōl, -zȯl noun
Etymology: International Scientific Vocabulary pyr- + azole; originally formed as German pyrazol
1. : a crystalline feeble heterocyclic base C 3 H 4 N 2 isomeric with imidazole obtained usually by action of acetylene on diazomethane; 1,2-diazole
2. : a derivative of pyrazole