\Az"ole\, n. [From {Azote}.] (Org. Chem.)
Any of a large class of compounds characterized by a
five-membered ring which contains an atom of nitrogen and at
least one other noncarbon atom (nitrogen, oxygen, sulphur).
The prefixes furo-, thio, and pyrro- are used to distinguish
three subclasses of azoles, which may be regarded as derived
respectively from furfuran, thiophene, and pyrrol by
replacement of the {CH} group by nitrogen; as, furo-monazole.
Names exactly analogous to those for the azines are also
used; as, oxazole, diazole, etc.