- a nematocyst.
Origin of cnida
1875–80; < Latin cnīdē nettle < Greek knī́dē
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for cnida
Cnida, knī′da, n. one of the thread-cells of the Cœlenterata, whence is their power of stinging:—pl.