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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Trump also signed measures to overturn state policies that curb tailpipe emissions in certain vehicles and smog-forming nitrogen oxide pollution from trucks. Noelle Phillips, Denver Post, 13 June 2025 The plant is among the nation’s top sulfur dioxide emitters and the sixth largest for nitrogen oxides, according to 2024’s EPA Clean Air Markets Program Data. Ignacio Calderon, USA Today, 23 May 2025 According to Citizens’ Climate Lobby, burning fossil fuels releases a mix of harmful pollutants including carbon dioxide, sulfur dioxide, nitrogen oxides, and particulate matter that contribute to global warming, smog, acid rain, and severe respiratory illnesses. Dianne Plummer, Forbes.com, 22 May 2025 One of the truck rules the House voted to overturn explicitly seeks to make more trucks electric, while the other seeks to limit emissions of nitrogen oxides, which can form smog and also contribute to asthma and respiratory infections. Rachel Frazin, The Hill, 30 Apr. 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 18 Jun. 2025.

Kids Definition

nitrogen oxide

noun
: any of various oxides of nitrogen: as

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