/ˈsefləpɒd;ˈke-||; ˈsɛfələˌpɑd/noun [C] any of the CLASSof sea animals that have a large soft head, large eyes and eight or ten long thin legs(tentacles) 头足纲动物（头大而软，大眼睛，有八或十只细长的腕足）: Octopus and squid are cephalopods. 章鱼和枪乌贼是头足纲动物。