nitrogen oxide

noun

: any of several oxides of nitrogen most of which are produced in combustion and are considered to be atmospheric pollutants: such as

Examples of nitrogen oxide in a Sentence

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An additional benefit of this design is the ability to reduce nitrogen oxide formation by optimizing the distribution of oxidizer and fuel along the flame. Prabhat Ranjan Mishra, Interesting Engineering, 30 Oct. 2025 The nitrogen oxides deplete ozone directly, while metals can seed polar stratospheric clouds or act as reaction surfaces that amplify ozone loss. New Atlas, 25 Oct. 2025 The sharp deterioration in air quality this week comes following celebrations for Diwali, the Hindu festival of lights, which traditionally involves the widespread use of firecrackers which release sulfur oxides and nitrogen oxides into the air, as well as harmful heavy metals. Rhea Mogul, CNN Money, 22 Oct. 2025 Further modifications typically include the development of fuel nozzles that let the machine run on natural gas rather than aviation fuel, and a combustor that minimizes the emission of nitrogen oxides, a major pollutant. IEEE Spectrum, 20 Oct. 2025 See All Example Sentences for nitrogen oxide

Word History

First Known Use

1868, in the meaning defined above

Time Traveler
The first known use of nitrogen oxide was in 1868

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Cite this Entry

“Nitrogen oxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nitrogen%20oxide. Accessed 1 Nov. 2025.

Kids Definition

nitrogen oxide

noun
: any of various oxides of nitrogen: as

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