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nitrogen dioxide


from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A poisonous brown gas, NO2, often found in smog and automobile exhaust fumes and synthesized for use as a nitrating agent, a catalyst, and an oxidizing agent.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. the binary compound NO2, a brownish gas that is a poisonous air pollutant; it exists in equilibrium with dinitrogen tetroxide.

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

  • n. a highly poisonous brown gas (NO2)


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