nitrogen_oxide has definitions from the field of chemistry
1
[ noun ] (chemistry) any of several oxides of nitrogen formed by the action of nitric acid on oxidizable materials; present in car exhausts

Used in print

(James A. Ibers et al., "Proton magnetic resonance...)

Mass_spectrometric analysis of gases evolved upon heating to 410 ` C indicated nitrogen_oxides and water_vapor .

Related terms

oxide pollutant

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