<p><strong>Noun</strong></p><ul><li>Any mollusk of the class Cephalopoda, having tentacles attached to the head, including the cuttlefish, squid, and octopus.</li></ul><p><strong>Adjective</strong></p><ul><li>Also cephalopodic, cephalopodous: belonging or pertaining to the Cephalopoda.</li></ul>