• (British) IPA: /nɪˈdɛːɹɪən/, /nʌɪˈdɛːɹɪən/
  • (America) IPA: /nʌɪˈdɛːɹɪən/, /nɪˈdɛːɹɪən/

cnidarian (plural cnidarians)

  1. (zoology) Any of various invertebrate animals, such as jellyfish, hydras, sea anemones, corals and formerly sponges and ctenophores that belong to the phylum Cnidaria. [from 19th c.]
    • 2016, Peter Godfrey-Smith, Other Minds, William Collins 2018, p. 35:
      A general feature of cnidarians, as I noted above, is their stinging cells.

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