'Polychaeta' definitions:
Definition of 'Polychaeta'
From: WordNet
noun
Marine annelid worms [syn: Polychaeta, class Polychaeta]
Definition of 'Polychaeta'
From: GCIDE
- Polychaeta \Pol`y*ch[ae]"ta\, n. pl. [NL., from Gr. poly`s many + ? hair.] (Zool.) One of the two principal groups of Ch[ae]topoda. It includes those that have prominent parapodia and fascicles of set[ae]. See Illust. under Parapodia. [1913 Webster]