turbellarian

noun

tur·​bel·​lar·​i·​an ˌtər-bə-ˈler-ē-ən 

: any of a class (Turbellaria) of mostly aquatic and free-living flatworms (such as a planarian)

turbellarian adjective

Word History

Etymology

ultimately from Latin turbellae (plural) bustle, stir, diminutive of turba confusion, crowd; from the tiny eddies created in water by the cilia

First Known Use

1883, in the meaning defined above

Medical Definition

turbellarian

noun

tur·​bel·​lar·​i·​an -ˈler-ē-ən, -ˈlar- 

: any flatworm of the class Turbellaria

turbellarian adjective