Definition
noun
A group of eukaryotic animals with worm-like appearance (i.e. small animals with long, slender body and without appendages) and mostly parasitic. This group includes Platyhelminthes (flatworms), Nematoda (roundworms), Acanthocephala (thorny-headed worms), and Annelida (segmented worms).
Supplement
Synonym(s):
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