The Collaborative International Dictionary of English v.0.48:

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]

WordNet (r) 3.0 (2006):

apomorphine
    n 1: a morphine derivative that is not as strong as morphine;
         used as an emetic and in small doses as a sedative