nematocisto 23
Nematocisto: m. (Zool. ) Each stinging vesicles of the coelenterates, consisting of a small intracellular capsule, which contains a stinging filament that distills an irritating liquid. Some species of coelenterates, such as jellyfish and the siphonophore, have Nematocysts which cause a very unpleasant itching.
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