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
Recent Examples on the Web
American farming is, by far, the largest source of domestic nitrous oxide emissions already—about 50 percent.
—
ArsTechnica, 14 June 2025
Her cause of death was listed as methemoglobinemia in the setting of recent nitrous oxide administration.
—Jillian Frankel, People.com, 30 May 2025
Connelly is accused of a bevy of misdeeds in the letter, including instructing West on how to self-administer nitrous oxide without any medical supervision or safeguards.
—Kevin Dolak, HollywoodReporter, 1 May 2025
Inhaling nitrous oxide is a modern twist on an old high.
—Ella Jeffries, Smithsonian Magazine, 8 Apr. 2025
See All Example Sentences for nitrous oxide
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ArsTechnica, 14 June 2025
Her cause of death was listed as methemoglobinemia in the setting of recent nitrous oxide administration.
—Jillian Frankel, People.com, 30 May 2025
Connelly is accused of a bevy of misdeeds in the letter, including instructing West on how to self-administer nitrous oxide without any medical supervision or safeguards.
—Kevin Dolak, HollywoodReporter, 1 May 2025
Inhaling nitrous oxide is a modern twist on an old high.
—Ella Jeffries, Smithsonian Magazine, 8 Apr. 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 17 Jun. 2025.
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