dorsibranchiata
dor`si*bran`chi*a"ta, n. pl. Etym: [NL., from L. dorsum back + branchiae gills.] (Zoöl.) Defn: A division of chætopod annelids in which the branchiæ are along the back, on each side, or on the parapodia. [See Illusts. under Annelida and Chætopoda.]