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Webster 1913 Edition
Chaetopoda
‖
Chæ-top′o-da
,Noun.
pl.
[NL., from Gr. [GREEK] hair +
-poda
.] (Zool.)
A very extensive order of Annelida (segmented worms), characterized by the presence of lateral setæ, or spines, on most or all of the segments. They are divided into two principal groups:
Oligochæta
, including the earthworms and allied forms, and Polychæta
, including most of the marine species.