nitrogen dioxide


Definition of nitrogen dioxide

: 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 Those air readings focus on only six major pollutants: ground-level ozone, particle pollution, carbon monoxide, and two ozone constituents, sulfur dioxide and nitrogen dioxide. Mark Schleifstein,, "Louisiana should better identify air pollution violations, speed enforcement, auditor says," 26 Jan. 2021 The atmosphere in Connecticut was noticeably less polluted by nitrogen dioxide, carbon monoxide and black carbon, the state Department of Energy and Environmental Protection reported in June. Stephen Singer,, "Climate change in Connecticut in 2020: A massive storm, drought and a push to develop more wind energy," 30 Dec. 2020 Los Angeles experienced a similar nitrogen dioxide pattern, underscoring the depth of the impact from pollution blowing across the Pacific, primarily from China, Shin said. Erin Stone, azcentral, "Traffic was down in Phoenix, but ozone levels remained stubbornly high. What's happening?," 12 June 2020 The result is an explosion that releases gases, including nitrogen dioxide, which is orange or reddish in color. USA Today, "Massive explosion rocks Beirut: Before and after images show extensive damage," 6 Aug. 2020 Its scale measures the levels of five major pollutants: ground-level ozone, carbon monoxide, sulfur dioxide, nitrogen dioxide, and particulate matter. Sarah Gibbens, National Geographic, "How breathing in wildfire smoke affects the body," 15 Sep. 2020 According to information on the web site, at 9 a.m. Wednesday, MAML #1 measured 2.27 parts per million of methane, 144.2 parts per billion of nitric oxide, 40.1 ppb of nitrogen dioxide, and 184.8 ppb of nitrogen oxide, a precursor of ozone. Mark Schleifstein,, "Louisiana moves two mobile air monitoring labs to Lake Charles," 3 Sep. 2020 The five largest Bay Area counties each saw drops in concentrations of greenhouse gas carbon dioxide and air pollutant nitrogen dioxide beyond what would be seasonally expected. Taylor Kate Brown, San Francisco Chronicle, "County-by-county Bay Area air pollution during the lockdown," 25 Aug. 2020 Third place winner Brendan Crotty designed and built an efficient hybrid gas burner that operates at higher temperatures than current industrial burners, yet emits 19 percent less polluting nitrogen dioxide gas. Amanda Baker, Scientific American, "Competing Toe to Toe without Sharing an Arena," 19 Aug. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'nitrogen dioxide.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of nitrogen dioxide

1869, in the meaning defined above

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Time Traveler for nitrogen dioxide

Time Traveler

The first known use of nitrogen dioxide was in 1869

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Statistics for nitrogen dioxide

Last Updated

21 Feb 2021

Cite this Entry

“Nitrogen dioxide.” Dictionary, Merriam-Webster, Accessed 28 Feb. 2021.

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More Definitions for nitrogen dioxide

nitrogen dioxide


Medical Definition of nitrogen dioxide

: a poisonous strongly oxidizing reddish brown gas NO2

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