any of a class of molluscs including the squids, cuttlefishes, and octopuses, that have muscular tentacles around the head, usu furnished with suckers, and highly developed eyes: class Cephalopoda
cephalopod adj
cephalopodan /sefəʹlopədən, -ʹpohdən/ adj and noun
[cephalo- + Greek pod-, pous foot]