noun Chaetopoda n. pl. (Zool.) A very extensive order of Annelida (segmented worms), characterized by the presence of lateral setae, or spines, on most or all of the segments. They are divided into two principal groups: Oligochaeta, including the earthworms and allied forms, and Polychaeta, including most of the marine species.
Collaborative International Dictionary of English 0.48
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