Chætopoda /(?)/

Chæ·top·o·da

Chætopoda

n. pl.
  1. 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. (Zool.)