A class of mollusk that includes the octopus, squid and cuttlefish. It's the most biologically advanced of the mollusks. All cephalopods share two common charcteristics -- tentacles attached to the head, and ink sacs, which they use to avoid their predators. Though cephalopods have never been broadly accepted in the United States, they're quite popular with many southern Europeans, Japanese and Chinese.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.