of, relating to, or belonging to the Dibranchiata, a group or former order of cephalopod molluscs, including the octopuses, squids, and cuttlefish, having two gills
noun
2.
any dibranchiate mollusc
dibranchiate in American English
(daɪˈbræŋkiɪt; daɪˈbræŋkiˌeɪt)
adjective
having one pair of gills
said of most cephalopods, including the squids and octopuses see also tetrabranchiate
Word origin
< ModL Dibranchia < Gr di-, two + branchia, gills of fish