Webster's English Dictionary

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annelid

an.ne.lid \'an-*l-*d\ \*-'nel-*d-*n\ n [deriv. of L anellus little ring - 
   more at ANNULET] : any of a phylum (Annelida) of coelomate and usu. 
   elongated segmented inv ertebrates including the earthworms, various marine 
   worms, leeches, and related forms - annelid aj