[1] : The Collaborative International Dictionary of English v.0.48

dibranchiata \dibran`chia"ta\, n. pl. nl., fr. gr. di- =
   di`s- twice + ? gills. zool.
   an order of cephalopods which includes those with two gills,
   an apparatus for emitting an inky fluid, and either eight or
   ten cephalic arms bearing suckers or hooks, as the octopi and
   squids. see cephalopoda.
   1913 webster
see also:
cephalopoda 

[2] : WordNet (r) 2.0

dibranchiata
     n : comprising all living cephalopods except the family
         nautilidae: the orders octopoda octopuses and decapoda
         squids and cuttlefish syn: subclass dibranchiata, dibranchia,
          subclass dibranchia
see also:
subclass dibranchiata dibranchia subclass dibranchia 

Dibranchiata >> D Words
Dibranchiata, definition of term: Dibranchiata
dibranchiata_pag1.html