Source : Webster's Revised Unabridged Dictionary (1913)

Amido \A*mi"do\, a. [From {Amide}.] (Chem.)
   Containing, or derived from, amidogen.

   {Amido acid}, an acid in which a portion of the nonacid
      hydrogen has been replaced by the amido group. The amido
      acids are both basic and acid.

   {Amido group}, amidogen, {NH2}.

Amidogen \A*mid"o*gen\, n. [Amide + -gen.] (Chem.)
   A compound radical, {NH2}, not yet obtained in a separate
   state, which may be regarded as ammonia from the molecule of
   which one of its hydrogen atoms has been removed; -- called
   also the {amido group}, and in composition represented by the
   form amido.