noun plural

Cni·​dar·​ia nī-ˈdar-ē-ə How to pronounce Cnidaria (audio)
: a phylum of more or less radially symmetrical invertebrate animals that lack a true body cavity, possess tentacles studded with nematocysts, and include the hydroids, jellyfishes, sea anemones, and corals

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Cite this Entry

“Cnidaria.” Medical Dictionary, Merriam-Webster, Accessed 19 May. 2024.

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