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 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 According to the agency Transport for London, the ULEZ has helped to reduce roadside nitrogen dioxide concentrations by 53% in central London. Christine Ro, Forbes, 6 Sep. 2024 The study found, for instance, that nitrogen dioxide, or smog, is more prevalent in low-income pockets of East and West Oakland, which are boxed in by Interstates 80, 880, 580 and State Route 24. Lisa M. Krieger, The Mercury News, 7 Aug. 2024 See all Example Sentences for nitrogen dioxide 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'nitrogen dioxide.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1869, in the meaning defined above

Time Traveler
The first known use of nitrogen dioxide was in 1869

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 2 Oct. 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

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