/terr'beuh lair"ee euhn/ , adj.
1. belonging to the Turbellaria, a class of platyhelminths or flatworms, mostly aquatic and having cilia on the body surface.
n.
2. a turbellarian platyhelminth.
[ 1875-80; Turbellari ( a ) (L turbell ( ae ) a stir, row (pl. dim. of turba turmoil) + -aria, neut. pl. of -ARIUS -ARY) + -AN ]