GNU Collaborative International Dictionary of English

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Found one definition

1.       
   Nitrite (?), n. [Cf. F. nitrite. See Niter.] (Chem.) A salt or ester of nitrous acid; a compound bearing the -NO2 radical.
   
   [1913 Webster +PJC]
   
   Amyl nitrite, a yellow oily volatile liquid, used in medicine as a depressant and a vaso-dilator.  Its inhalation produces an instantaneous flushing of the face.
   
   [1913 Webster]