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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Lightning creates extreme heat that breaks apart nitrogen and oxygen molecules, producing nitrogen oxides. Aamir Khollam, Interesting Engineering, 29 Aug. 2025 The ports have already cut nitrogen oxide emissions by 72%, and diesel particulate matter by 91% since 2006. Timothy Jemal, Oc Register, 16 Aug. 2025 Planes emit a lot of carbon dioxide and nitrogen oxides, also greenhouse gases. Dave Smith, Fortune, 14 Aug. 2025 The Omnibus Regulation, meanwhile, has sought to slash nitrogen oxide emissions by 90 percent and update engine testing protocols. Rachel Frazin, The Hill, 13 Aug. 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 9 Sep. 2025.

Kids Definition

nitrogen oxide

noun
: any of various oxides of nitrogen: as

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