flatworm


flat·worm

noun \-ˌwərm\

Definition of FLATWORM

:  any of a phylum (Platyhelminthes) of soft-bodied usually much flattened acoelomate worms (as the planarians, flukes, and tapeworms) —called also platyhelminth

First Known Use of FLATWORM

1874

flat·worm

noun \ˈflat-ˌwərm\   (Medical Dictionary)

Medical Definition of FLATWORM

: any worm of the phylum Platyhelminthes : platyhelminth; especially : turbellarian

flatworm

noun    (Concise Encyclopedia)

Any of a phylum (Platyhelminthes) of soft-bodied, usually much-flattened worms, including both free-living and parasitic species. Flatworms live in a variety of marine, freshwater, and terrestrial habitats worldwide. They range in length from much less than an inch (a fraction of a millimeter) to 50 ft (15 m) and are of three main types: turbellarians (including the planarian), trematodes (see fluke), and cestodes (see tapeworm). Flatworms are bilaterally symmetrical and lack respiratory, skeletal, and circulatory systems and a body cavity. Turbellarians are mostly free-swimming, but trematodes and cestodes are parasites.

Variants of FLATWORM

flatworm or platyhelminth

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