an organ in coelenterates consisting of a minute capsule containing an ejectable thread that causes a sting.
- nem·a·to·cys·tic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use nematocyst in a sentence
The cnidoblasts are the mother-cells of the nematocysts, each cell producing one nematocyst in its interior.
The entire nematocyst is enclosed in the cnidoblast which formed it.
British Dictionary definitions for nematocyst
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, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for nematocyst
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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