As nouns the difference between flatworm and polyclad
is that flatworm is any of very many parasitic or free-living worms, of the phylum Platyhelminthes, having a flattened body with no skeleton or body cavity while polyclad is any member of the Polycladida, a highly diverse clade of free-living marine turbellarian flatworms.
flatworm
Noun
(
en noun)
Any of very many parasitic or free-living worms, of the phylum Platyhelminthes , having a flattened body with no skeleton or body cavity.
polyclad
English
Noun
(
en noun)
Any member of the Polycladida , a highly diverse clade of free-living marine turbellarian flatworms.