noun Download 🔗Share Any simple aquatic animal formerly considered to belong to the phylum Coelenterata, now divided into the cnidarians and ctenophores. Examples : "In biology class, we learned that the term "coelenterates," once used to group jellyfish and sea anemones together, is now outdated because these animals are classified into separate phyla, Cnidaria and Ctenophora. " animal biology ocean Chat with AIVocabulary GamePractice Reading