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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On the other hand, Roman concrete emits much lower volumes of such air pollutants as nitrogen oxide and sulfur oxide—between 11 percent and 98 percent less, depending on whether the energy source was fossil fuels, biomass, or renewable energy (which had the biggest reductions). Jennifer Ouellette, ArsTechnica, 30 July 2025 Those emissions include carbon dioxide, nitrogen oxides, mercury, sulfur dioxide and fine particulate matter. Noelle Phillips, Denver Post, 17 July 2025 Exposure to high levels of nitrogen oxides, which are precursors to ozone formation, have been associated with higher risk of death from respiratory disease. Lora Kolodny, CNBC, 3 July 2025 Some commenters raised concerns that hydrogen also produces air pollutants such as nitrogen oxides and can be more prone to leakage and explosions. Emilie Takahashi, Oc Register, 3 July 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 5 Aug. 2025.

Kids Definition

nitrogen oxide

noun
: any of various oxides of nitrogen: as

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