apomorphine n 1: a morphine derivative that is not as strong as morphine; used as an emetic and in small doses as a sedative
Apomorphia \Ap`o*mor"phi*a\, Apomorphine \Ap`o*mor"phine\, n. [Pref. apo- + morphia, morphine.] (Chem.) A crystalline alkaloid obtained from morphia. It is a powerful emetic. [1913 Webster]