from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The univalent anionic group NO2, derived from nitrous acid, or a compound containing this group.

from The Century Dictionary.

  • noun A salt of nitrous acid. Azotite is a synonym.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Chem.) A salt or ester of nitrous acid; a compound bearing the -NO2 radical.
  • noun a yellow oily volatile liquid, used in medicine as a depressant and a vaso-dilator. Its inhalation produces an instantaneous flushing of the face.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun chemistry any salt or ester of nitrous acid
  • noun chemistry the univalent radical -NO2, and the anion NO2-

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the radical -NO2 or any compound containing it (such as a salt or ester of nitrous acid)


Sorry, no etymologies found.


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