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|Noun||1.||class Trematoda - parasitic flatworms (including flukes)|
helminth, parasitic worm - worm that is parasitic on the intestines of vertebrates especially roundworms and tapeworms and flukes
trematode, trematode worm, fluke - parasitic flatworms having external suckers for attaching to a host
cercaria - tadpole-shaped parasitic larva of a trematode worm; tail disappears in adult stage
class - (biology) a taxonomic group containing one or more orders