Actinozoa

(ak-tin -o-zo'-ah). A division of cel enter ates including the sea anemones, coral-polyps, He., having rayed tentacles about the mouth, and a digestive sac connected to the body wall by radial di epiments called mesenteries, i Actinula. In biology, the oval generative zooid of a gymnoblastic hydroid, developing without intermediate metamorphosis into a hydroid of the adult form.