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|Noun||1.||Dibranchia - comprising all living cephalopods except the family Nautilidae: the orders Octopoda (octopuses) and Decapoda (squids and cuttlefish)|
Belemnoidea, order Belemnoidea - order of extinct dibranchiate cephalopods related to the surviving spirulas
class - (biology) a taxonomic group containing one or more orders