prop. n. pl. [ NL., fr. Gr. 'oli`gos little, pl., few + &unr_; hair. ] (Zool.) An order of Annelida which includes the earthworms and related species, including some small freshwater species. [ 1913 Webster +PJC ]
‖n. pl. [ NL., from Gr. poly`s many + &unr_; hair. ] (Zool.) One of the two principal groups of Chætopoda. It includes those that have prominent parapodia and fascicles of setæ. See Illust. under Parapodia. [ 1913 Webster ]
{ ‖‖ } n. [ L. spira a coil + Gr. &unr_;&unr_;&unr_; hair. ] (Biol.) A genus of Spirobacteria similar to Spirillum, but distinguished by its motility. One species, the Spirochaete Obermeyeri, is supposed to be the cause of relapsing fever. [ 1913 Webster ]