The Collaborative International Dictionary of English v.0.48:
Vomitive \Vom"i*tive\, a. [Cf. F. vomitif.] Causing the ejection of matter from the stomach; emetic. [1913 Webster]WordNet (r) 3.0 (2006):
vomitive n 1: a medicine that induces nausea and vomiting [syn: emetic, vomit, vomitive, nauseant]