flat worm
Meaning
A flat worm is a simple invertebrate with a soft, flattened body. It includes planarians, flukes, and tapeworms in the phylum Platyhelminthes. Many species live in water or soil, and some are parasites of animals and people.
Synonyms
pinworm
tapeworm
nematode
roundworm
hookworm
trematode
helminth
cestode
platyhelminth
planarian
whipworm
ribbon worm
threadworm