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

Recent Examples on the Web
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For example, in 2010 the federal government set new standards for diesel trucks that significantly reduced their nitrogen oxide emissions, one of the pollutants that contributes to ozone. Jeff Wagner, CBS News, 10 June 2026 At the same time, lower fuel use also cuts carbon dioxide (CO2), nitrogen oxides (NOx), and (ultra)fine particle emissions. Georgina Jedikovska, Interesting Engineering, 10 June 2026 This ground-level ozone can form when carbon monoxide gas emitted by wildfires chemically reacts with nitrogen oxides in the presence of sunlight. Jeanna Bryner, Scientific American, 8 June 2026 In a statement on Wednesday, the environmental group said generators release air pollutants, such as benzene, formaldehyde and nitrogen oxides, that are harming the nearby Big Cypress National Preserve. Miami Herald, 27 May 2026 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 18 Jun. 2026.

Kids Definition

nitrogen oxide

noun
: any of various oxides of nitrogen: as

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