'subclass Dibranchia' definitions:
Definition of 'subclass Dibranchia'
From: WordNet
noun
Comprising all living cephalopods except the family Nautilidae: the orders Octopoda (octopuses) and Decapoda (squids and cuttlefish) [syn: Dibranchiata, subclass Dibranchiata, Dibranchia, subclass Dibranchia]