a compound containing the azido group combined with an element or radical.

any chemical compound containing the azido group -N3, such as sodium azide (ionic and inorganic) or ethyl azide (organic and nonionic).

Azide is the anion with the formula N3-. It is the conjugate base of hydrazoic acid. Azide is also a functional group in organic chemistry, RN3 Review: S.