Source : Webster's Revised Unabridged Dictionary (1913)

Diamide \Di*am"ide\ (?; 104), n. [Pref. di- + amide.] (Chem.)
   Any compound containing two amido groups united with one or
   more acid or negative radicals, -- as distinguished from a
   diamine. Cf. Amido acid, under {Amido}, and Acid amide, under
   {Amide}.