dibranch

from WordNet (r) 3.0 (2006)

dibranch
    n 1: cephalopods having two gills [syn: {dibranchiate},
         {dibranchiate mollusk}, {dibranch}]

from The Collaborative International Dictionary of English v.0.48

dibranch \dibranch\ n.
   a cephalopod having two gills; a member of the
   {Dibranchiata}.

   Syn: dibranchiate, dibranchiate mollusk.
        [WordNet 1.5 +PJC]