Definitions for "Cnidarians"
(Pronounced 'nai-day-rians', the 'c' is silent.) Animals from the Phylum Cnidaria. All are aquatic and one of the features unique to them are stinging cells used for protection and to catch prey. Examples include jellyfish, sea anemones and corals.
invertebrates with stinging structures that may occur as polyps and medusas; examples include sea anemone, jellyfish, gorgonian, and sea pansy.