having one pair of gills: said of most cephalopods, including the squids and octopuses
Origin:
< ModL Dibranchia < Gr di-, two + branchia, gills of fish
See dibranchiate in American Heritage Dictionary 4
noun
A member of the order Dibranchiata, a classification formerly used for the two-gilled cephalopods, which include the octopuses, cuttlefish, and squids.