"An aquatic invertebrate animal of a phylum that includes jellyfishes, corals, and sea anemones. They typically have a tube- or cup-shaped body with a single opening ringed with tentacles that bear stinging cells (nematocysts)", Late 19th century: from modern Latin Coelenterata, from Greek koilos 'hollow' + enteron 'intestine'.[coelenterate etymology, coelenterate origin, 英语词源]