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nitrobenzene
nitrocellulose
nitrochloroform
nitrofuran
nitrofurantoin
nitrogen
nitrogen balance
nitrogen cycle
nitrogen dioxide
nitrogen fixation
nitrogen mustard
nitrogen narcosis
nitrogenase
nitrogenize
nitrogenous base
nitroglycerin
nitrohydrochloric acid
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nitrogen dioxide
ni·tro·gen di·ox·ide


noun 
Definition:
 
poisonous brown gas: a highly poisonous brown gas often present in smog and exhaust from vehicles. Use: manufacture of nitric and sulfuric acids. NO2
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