Noun flatworm has 1 sense
  1. 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
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