Source : Webster's Revised Unabridged Dictionary (1913)

Turbellaria \Tur`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.

Source : WordNet®

Turbellaria
     n : free-living flatworms [syn: {class Turbellaria}]