Noah Webster Dictionary (1913 edition): Chaetopoda

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Noah Webster Dictionary (1913 edition): Chaetopoda


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(n. pl.) A very extensive order of Annelida, 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.