‖Tur′bel‐la″ri‐a (?), n. pl. [NL., dim. fr. L. turbo a whirling.] (Zoöl.) 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.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.