triclad

noun

tri·​clad ˈtrī-ˌklad 

: any of an order (Tricladida) of turbellarian flatworms (such as a planarian) having an intestine with one anterior and two posterior branches

triclad adjective

Word History

Etymology

New Latin Tricladida, ultimately from tri- + Greek klados branch — more at clad-

First Known Use

1888, in the meaning defined above