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. [ Webster 1913 Suppl. ]

a. [ Azo- + oleic. ] (Chem.) Pertaining to an acid produced by treating oleic with nitric acid. [ R. ] [ 1913 Webster ]

n. [ Indol + azote. ] (Chem.) A bicyclic nitrogenous compound, C7H6N2, analogous to indole, having a benzene ring fused to a pyrazole ring; called also indazol and benzopyrazole. It can be produced from a diazo derivative of cinnamic acid. [ 1913 Webster +PJC ]

n. [ Tetrazo- + -ole. ] (Org. Chem.) A crystalline acid substance, CH2N4, which may be regarded as pyrrol in which nitrogen atoms replace three CH groups; also, any of various derivatives of the same. [ Webster 1913 Suppl. ]