<zoology> One of the grand divisions or branches of the animal kingdom. It is a large group including a vast number of species, most of which are parasitic.

Synonyms: Enthelminthes, Enthelmintha.

The following classes are included, with others of less importance: Cestoidea (tapeworms), Trematodea (flukes, etc), Turbellaria (planarians), Acanthocephala (thornheads), Nematoidea (roundworms, trichina, gordius), Nemertina (nemerteans). See Plathelminthes, and Nemathelminthes.

Origin: NL, fr. Gr, a worm.

(01 Mar 1998)