English English Wikipedia has an article on:diazoleWikipedia Etymology From di- + azole. Noun diazole (plural diazoles) (organic chemistry) Either of two unsaturated heterocycles consisting of a five-membered ring containing three carbon atoms, two nitrogen atoms and two double bonds - namely pyrazole and imidazole Derived terms 1,2-diazole (pyrazole) 1,3-diazole (imidazole) Related terms di- azole oxadiazoleWikiwand - on Seamless Wikipedia browsing. On steroids.