n. [ Pref. di- + amine. ] (Chem.) A compound containing two amido groups united with one or more basic or positive radicals, -- as contrasted with a diamide. [ 1913 Webster ]
☞ In chemical nomenclature, if any amine or diamine is named by prefixing the nitrogen group, the name of the latter takes the form of amido, diamido, etc., thus ethylene diamine,