The Collaborative International Dictionary of English v.0.48:
Helminthiasis \Hel`min*thi"a*sis\, n. [NL., fr. Gr. ? to suffer from worms, fr. ?, ?, a worm.] (Med.) A disease in which worms are present in some part of the body. [1913 Webster]WordNet (r) 3.0 (2006):
helminthiasis n 1: infestation of the body with parasitic worms