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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These fires result in incomplete combustion, releasing a toxic slurry of carbon monoxide, soot, sulfur, and nitrogen oxides that can form acid rain, along with metallic compounds and oil droplets. Mrigakshi Dixit, Interesting Engineering, 11 Mar. 2026 Opponents argue that xAI understated the amount of pollution that will be emitted by its turbines in its permit application, with particular concerns around smog-forming nitrogen oxides and other pollutants that can be harmful to human health, including formaldehyde and airborne particulate matter. Lora Kolodny, CNBC, 10 Mar. 2026 When fossil fuels such as oil, coal and gas burn, the combustion sends toxic compounds such as hydrocarbons, nitrogen oxides, sulfur dioxide, heavy metals and particulate matter into the atmosphere. Julia Jacobo, ABC News, 10 Mar. 2026 The Iranian Environmental Protection Organization warned people to stay indoors, as the explosions had released large amounts of toxic hydrocarbons and sulfur and nitrogen oxides. Alexander Smith, NBC news, 9 Mar. 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 15 Mar. 2026.

Kids Definition

nitrogen oxide

noun
: any of various oxides of nitrogen: as

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