nem·a·to·cyst (n m  -t-s st , n-m t-)n. A capsule within specialized cells of certain coelenterates, such as jellyfish, containing a barbed, threadlike tube that delivers a paralyzing sting when propelled into attackers and prey. Also called stinging cell. nem a·to·cystic adj. |
nematocyst [ˈnɛmətəˌsɪst nɪˈmætə-]
n
(Life Sciences & Allied Applications / Zoology) a structure in coelenterates, such as jellyfish, consisting of a capsule containing a hollow coiled thread that can be everted to sting or paralyse prey and enemies
nematocystic adj
| nematocyst (nm-t-sst, n-mt-sst) One of the minute capsules in the tentacles of cnidarians, such as jellyfish, hydras, or sea anemones, used for stinging. The capsule is produced by a special cell (called a cnidoblast) and contains a tightly coiled barbed thread that quickly shoots forth if the capsule's lid is disturbed. The thread often contains poison. |
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