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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
Looking at participants’ locations, the researchers measured the amount of nitrogen dioxide, nitrogen oxides, fine particulate matter (measuring 2.5 micrometers or smaller), and particulate matter (measuring 10 micrometers or smaller) each person was exposed to.
—Kaitlin Sullivan, Health, 10 Dec. 2024
Minimize exposure to air pollutants: Air pollutants such as particulate matter and nitrogen dioxide that can break down collagen as well.
—Bruce Y. Lee, Forbes, 4 Dec. 2024
The main villains are ground-level ozone, carbon monoxide, sulfur dioxide, nitrogen dioxide, and particles.
—Umair Irfan, Vox, 7 Dec. 2018
The green fertilizer is produced with a lower carbon footprint than traditional methods and works by removing nitrogen dioxide from the air and converting it to nitrogen, which is used by the plants for photosynthesis.
—Mark Faithfull, Forbes, 7 Oct. 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 22 Dec. 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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