the GNU version of the Collaborative International Dictionary of English
noun-plural. 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.
The Century Dictionary and Cyclopedia
An order of acetabuliferous cephalopods, containing the decapod and octopod Cephalopoda.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. comprising all living cephalopods except the family Nautilidae: the orders Octopoda (octopuses) and Decapoda (squids and cuttlefish)