| cnida | Synonym: nematocyst. Origin: G. Knide, nettle (05 Mar 2000) |
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| cnidaria | A phylum of radially symmetrical invertebrates having a body composed of two layers of cells which comprise definite tissues. It includes hydroids (hydra), jellyfish, sea anemones, and corals. (12 Dec 1998) |
| cnidarian venoms | Venoms from jellyfish, coral, sea anemone, nematocysts, etc. They contain haemo-, cardio-, dermo- , and neurotoxic substances and probably enzymes. They include palytoxin, sarcophine, and anthopleurine. (12 Dec 1998) |