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
Researchers found that 20% of pre-term births and adult deaths were connected to fine particulate pollution from oil and gas, and that 90% of new childhood asthma cases tied to nitrogen dioxide pollution were caused by the industry.
—
Mary Whitfill Roeloffs, Forbes.com, 22 Aug. 2025
The researchers also found that the concentration levels of nitrogen dioxide hit far higher peaks after the turbines moved in, with the maximum value of hourly NASA data increasing by 79% compared to that of the pre-xAI period.
—Andrew R. Chow, Time, 13 Aug. 2025
The value is calculated from tracking five factors: ground-level ozone, particulate matter, carbon monoxide, sulfur dioxide and nitrogen dioxide.
—Katherine Weaver, Chicago Tribune, 31 July 2025
The maps showed data for multiple types of pollutant, including nitrogen dioxide (NO₂), particles (PM2.5), surface ozone, sulfur dioxide (SO₂), carbon monoxide (CO) concentration, aerosol, and dust mass.
—Joe Edwards, MSNBC Newsweek, 12 July 2025
See All Example Sentences for nitrogen dioxide
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Mary Whitfill Roeloffs, Forbes.com, 22 Aug. 2025
The researchers also found that the concentration levels of nitrogen dioxide hit far higher peaks after the turbines moved in, with the maximum value of hourly NASA data increasing by 79% compared to that of the pre-xAI period.
—Andrew R. Chow, Time, 13 Aug. 2025
The value is calculated from tracking five factors: ground-level ozone, particulate matter, carbon monoxide, sulfur dioxide and nitrogen dioxide.
—Katherine Weaver, Chicago Tribune, 31 July 2025
The maps showed data for multiple types of pollutant, including nitrogen dioxide (NO₂), particles (PM2.5), surface ozone, sulfur dioxide (SO₂), carbon monoxide (CO) concentration, aerosol, and dust mass.
—Joe Edwards, MSNBC Newsweek, 12 July 2025
See All Example Sentences for nitrogen dioxide
Cite this Entry
“Nitrogen dioxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nitrogen%20dioxide. Accessed 9 Sep. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share