CNIDARIAN
- a coelenterate, that includes sea anemones, hydra, jellyfish, and coral [n -S]
- belonging or pertaining to the Cnidaria
- any invertebrate animal, as a hydra, jellyfish, sea anemone, or coral, considered as belonging to the phylum Cnidaria, characterized by the specialized stinging structures in the tentacles surrounding the mouth; a coelenterate