Medical Definition of Cephalopoda
: a class of mollusks including the squids, cuttlefishes, and octopuses that have a tubular siphon under the head, a group of muscular arms around the front of the head which are usually furnished with suckers, highly developed eyes, and usually a bag of inky fluid which can be ejected for defense or concealment
cephalopod\ˈsef-ə-lə-ˌpäd\play adjective or noun
cephalopodan\ˌsef-ə-ˈläp-əd-ən\play adjective or noun
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