Source : Webster's Revised Unabridged Dictionary (1913)

dorsibranchiata \dor`si*bran`chi*a"ta\, n. pl. [NL., from L.
   dorsum back + branchiae gills.] (Zo["o]l.)
   A division of ch[ae]topod annelids in which the branchi[ae]
   are along the back, on each side, or on the parapodia. [See
   Illusts. under {Annelida} and {Ch[ae]topoda}.]