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/naɪˈdɛəɹ.i.ən/ · noun
(zoology) Any of various invertebrate animals, such as jellyfish, hydras, sea anemones, corals and formerly sponges and ctenophores that belong to the phylum Cnidaria..
A general feature of cnidarians, as I noted above, is their stinging cells.
Use cnidarian when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Cnidarian means (zoology) Any of various invertebrate animals, such as jellyfish, hydras, sea anemones, corals and formerly sponges and ctenophores that belong to the phylum Cnidaria..
Common synonyms include coelenterate.
The opposite depends on the specific sense.
A general feature of cnidarians, as I noted above, is their stinging cells.
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