cnidarian

Noun

1.

cnidarian - radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms Synonyms: coelenterate

actinozoan, anthozoan, Cnidaria, Coelenterata, coelenterate, coelenteron, hydroid, hydrozoan, invertebrate, jellyfish, medusa, medusan, phylum Cnidaria, phylum Coelenterata, polyp, scyphozoan