Source : Webster's Revised Unabridged Dictionary (1913)

Cyclobranchiate \Cy`clo*bran"chi*ate\ (s?`kl?-br?n"k?-?t), a.
   [Cyclo- + branchiate.] (Zo["o]l)
   Having the gills around the margin of the body, as certain
   limpets.