The Collaborative International Dictionary of English v.0.48:
Vermifuge \Ver"mi*fuge\, n. [Cf. F. vermifuge. See Vermifugal.] (Med.) A medicine or substance that expels worms from animal bodies; an anthelmintic. [1913 Webster]WordNet (r) 3.0 (2006):
vermifuge n 1: a medication capable of causing the evacuation of parasitic intestinal worms [syn: vermifuge, anthelmintic, anthelminthic, helminthic]