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Definition of Cnida
1. n. One of the peculiar stinging cells found in Cœlenterata; a nematocyst; a lasso cell.
Definition of Cnida
1. a stinging organ in a jellyfish [n -DAE]
Medical Definition of Cnida
1. Synonym: nematocyst. Origin: G. Knide, nettle (05 Mar 2000)