CEPHALOPOD

[ceph.a.lo.pod] n [ultim. fr. cephal- + Gk pod-, pous foot--more at foot] (1826): any of a class (Cephalopoda) of marine mollusks including the squids, cuttlefishes, and octopuses that move by expelling water from a tubular siphon under the head and that have a group of muscular usu. sucker-bearing arms around the front of the head, highly developed eyes, and usu. a sac containing ink which is ejected for defense or concealment -- cephalopod adj