Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of cnidaria is as below...

Cnidaria :: Cnidaria (n. pl.) A comprehensive group equivalent to the true Coelenterata, i. e., exclusive of the sponges. They are so named from presence of stinging cells (cnidae) in the tissues. See Coelenterata..

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