‖n. pl. [ NL., dim. fr. L. turbo a whirling. ] (Zool.) An extensive group of worms which have the body covered externally with vibrating cilia. It includes the Rhabdocœla and Dendrocœla. Formerly, the nemerteans were also included in this group. [ 1913 Webster ]
n. (Zool.) One of the Turbellaria. Also used adjectively. [ 1913 Webster ]