TurbellariaTur`bel*la"ri*a\, n. pl. [NL., dim. fr. L. turbo a whirling.] (Zo["o]l.) An extensive group of worms which have the body covered externally with vibrating cilia. It includes the Rhabdoc[oe]la and Dendroc[oe]la. Formerly, the nemerteans were also included in this group.