an organ in coelenterates consisting of a minute capsule containing an ejectable thread that causes a sting.
Origin of nematocyst
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The cnidoblasts are the mother-cells of the nematocysts, each cell producing one nematocyst in its interior.
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
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Online Etymology Dictionary, © 2010 Douglas Harper
A capsule within specialized cells of certain coelenterates containing a barbed, threadlike tube that delivers a paralyzing sting.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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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