\Am"ide\ (?; 277), n. [Ammonia + -ide.] (Chem.)
A compound formed by the union of amidogen with an acid
element or radical. It may also be regarded as ammonia in
which one or more hydrogen atoms have been replaced by an
acid atom or radical.
{Acid amide}, a neutral compound formed by the substitution
   of the amido group for hydroxyl in an acid.