nitrous oxide
noun
: a colorless gas N2O that when inhaled produces loss of sensibility to pain preceded by exhilaration and sometimes laughter, that is used especially as an anesthetic in dentistry and as a fuel, and that is an atmospheric pollutant and greenhouse gas produced by combustion
called also laughing gas
compare nitric oxideExamples of nitrous oxide in a Sentence
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When air pollution in the form of sulfur dioxide, nitrous oxide, particulate matter and mercury spew from fossil fuel burning power plants, the health of communities living nearby are at risk, according to the Environmental Protection Agency.
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Sophie Hartley, IndyStar, 14 Oct. 2025
Amy Louise Leonard, 20, a makeup artist from Greater Manchester in England, lost the ability to walk for three weeks after inhaling a balloon filled with nitrous oxide, commonly called laughing gas.
—Cara Lynn Shultz, PEOPLE, 10 Oct. 2025
While the record doesn't detail the events of Max's arrest, TMZ reported that the actor was allegedly abusing nitrous oxide before allegedly attacking his mother while livestreaming.
—Mekishana Pierre, Entertainment Weekly, 10 Oct. 2025
The team found that actual methane and nitrous oxide emissions from these facilities were far higher than the Environmental Protection Agency’s estimates.
—Neetika Walter, Interesting Engineering, 9 Oct. 2025
See All Example Sentences for nitrous oxide
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Sophie Hartley, IndyStar, 14 Oct. 2025
Amy Louise Leonard, 20, a makeup artist from Greater Manchester in England, lost the ability to walk for three weeks after inhaling a balloon filled with nitrous oxide, commonly called laughing gas.
—Cara Lynn Shultz, PEOPLE, 10 Oct. 2025
While the record doesn't detail the events of Max's arrest, TMZ reported that the actor was allegedly abusing nitrous oxide before allegedly attacking his mother while livestreaming.
—Mekishana Pierre, Entertainment Weekly, 10 Oct. 2025
The team found that actual methane and nitrous oxide emissions from these facilities were far higher than the Environmental Protection Agency’s estimates.
—Neetika Walter, Interesting Engineering, 9 Oct. 2025
See All Example Sentences for nitrous oxide
Cite this Entry
“Nitrous oxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nitrous%20oxide. Accessed 18 Oct. 2025.
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