cnidaria definition

  • noun:
    • cnidarian
    • hydras; polyps; jellyfishes; ocean anemones; corals
  • noun-plural:
    • A comprehensive group equivalent to the real Cœlenterata, i. e., unique of this sponges. They have been so named from presence of stinging cells (cnidae) in the cells. See coelenterata.
  • others:
    • Those Cœlentera which have thread-cells or cnidœ; the Cœlenterata, apart from the sponges. See Cœlentera.

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