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nitrogen dioxide
noun
: a toxic reddish brown gas NO2 that is a strong oxidizing agent, is produced by combustion (as of fossil fuels), and is an atmospheric pollutant (as in smog)
Examples of nitrogen dioxide in a Sentence
Recent Examples on the Web
Scientists found that the women who were exposed to higher levels of nitrogen dioxide and inhalable particulate pollution — two prevalent forms of air pollution — during their second trimester were nearly four times as likely to experience depression up to 3 years after their pregnancy.
—Tony Briscoe, Los Angeles Times, 5 Oct. 2024
Burning it for use emits a dangerous pollutant, nitrogen dioxide, into homes.
—Ben Jealous, The Mercury News, 8 Aug. 2024
Neighborhoods downwind of warehouses, less than 5 miles (roughly 7 kilometers) away, saw a nearly 20 percent increase in nitrogen dioxide pollution on average compared to neighborhoods upwind of warehouses.
—Justine Calma, The Verge, 12 Sep. 2024
In the Sant Antoni superblock, pollutants such as nitrogen dioxide and particles called PM10 – both commonly found in vehicle exhaust – fell by 25% and 17% respectively, according to a 2021 report by the Barcelona Public Health Agency.
—Erika Page, The Christian Science Monitor, 5 Sep. 2024
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Word History
First Known Use
1869, in the meaning defined above
Dictionary Entries Near nitrogen dioxide
Cite this Entry
“Nitrogen dioxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nitrogen%20dioxide. Accessed 15 Nov. 2024.
Kids Definition
nitrogen dioxide
noun
: a reddish brown poisonous gas that is an air pollutant formed from automobile exhausts
Medical Definition
nitrogen dioxide
noun
: a poisonous strongly oxidizing reddish brown gas NO2
More from Merriam-Webster on nitrogen dioxide
Britannica.com: Encyclopedia article about nitrogen dioxide
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