Amide \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which one or more hydrogen atoms have been replaced by an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.
[1913 Webster]
{Acid amide}, a neutral compound formed by the substitution
of the amido group for hydroxyl in an acid.
[1913 Webster]