PolychaetaPol`y*ch[ae]"ta\, n. pl. [NL., from Gr. poly`s many + ? hair.] (Zo["o]l.) 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.
|marine annelid worms|