- flatworm, platyhelminth - parasitic or free-living worms having a flattened body
--1 is a kind of worm
--1 is a member of Platyhelminthes, phylum Platyhelminthes
--1 has parts: flame cell
--1 has particulars:planarian, planaria; fluke, trematode, trematode worm; tapeworm, cestode