Home › Words › H › helminthiasishelminthiasishelminthiasis means any of various infectious diseases comprising and developing from infestation with any of various parasitic worms.EtymologyFrom helminth (“parasitic flatworm or roundworm”) + -iasis.nounAny of various infectious diseases comprising and developing from infestation with any of various parasitic worms.Definitions & examples from Wiktionary (CC BY-SA 3.0).