The Collaborative International Dictionary of English v.0.48:
Helminth \Hel"minth\, n. [Gr. ?, ?, a worm.] (Zool.) An intestinal worm, or wormlike intestinal parasite; one of the Helminthes. [1913 Webster]WordNet (r) 3.0 (2006):
helminth n 1: worm that is parasitic on the intestines of vertebrates especially roundworms and tapeworms and flukes [syn: helminth, parasitic worm]