Az"ole (?), n. [From Azote.]
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.
© Webster 1913.