polyclad

[pol-ee-klad]
noun
  1. any free-swimming, marine flatworm of the order Polycladida, having a broad, flat body and a many-branched gastrovascular cavity.

Origin of polyclad

1885–90; < New Latin Polycladus genus name < Greek polýklados many-branched. See poly-, clado-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018