Radial symmetry. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/radial-symmetry
Symmetrical arrangement of parts of an organism around a single main axis, so that the organism can be divided into similar halves by any plane that contains the main axis. The body plans of echinoderms, ctenophores, cnidarians, and many sponges and sea anemones show radial symmetry.