nitrous oxide

noun

Definition of nitrous oxide

: 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 oxide

Examples of nitrous oxide in a Sentence

Recent Examples on the Web Fossil fuels amount to 86 percent of annual carbon dioxide emissions, and a significant portion of methane, nitrous oxide, and black carbon emissions. Kate Aronoff, The New Republic, 18 Nov. 2021 Ground-level ozone is created mostly by humans, formed by pollutants—such as nitrous oxide, methane, and volatile organic compounds—that are emitted by cars, trucks, refineries, power plants, and oil and gas development. Jim Robbins, Wired, 16 Oct. 2021 Drawing on emissions data from the Food and Agriculture Organization, The Post found a similar gap: three times as much nitrous oxide as Australia’s reports to the United Nations. Anchorage Daily News, 8 Nov. 2021 Drawing on emissions measurements from the Food and Agriculture Organization, The Post found a similar gap: three times as much nitrous oxide than Australia’s reports to the United Nations. Washington Post, 7 Nov. 2021 When cattle waste gets into the soil, the ammonia converts into the greenhouse gas nitrous oxide. Ashley Strickland, CNN, 18 Sep. 2021 Markets have felt jittery following a strong run from US equities in advance of potential Fed tapering, turning down the financial nitrous oxide, with Evergrande’s situation leading to some chips coming off the table. Brendan Ahern, Forbes, 20 Sep. 2021 In 2019, nitrous oxide comprised 7% of all the U.S. greenhouse gases, according to the Environmental Protection Agency. Seth Borenstein, USA TODAY, 14 Sep. 2021 In 2019, nitrous oxide comprised 7% of all the U.S. greenhouse gases, according to the Environmental Protection Agency. Seth Borenstein, Anchorage Daily News, 13 Sep. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'nitrous oxide.' 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 nitrous oxide

1798, in the meaning defined above

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Time Traveler for nitrous oxide

Time Traveler

The first known use of nitrous oxide was in 1798

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Dictionary Entries Near nitrous oxide

nitrous ether

nitrous oxide

nitrous vitriol

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Statistics for nitrous oxide

Last Updated

27 Nov 2021

Cite this Entry

“Nitrous oxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nitrous%20oxide. Accessed 5 Dec. 2021.

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More Definitions for nitrous oxide

nitrous oxide

noun

English Language Learners Definition of nitrous oxide

: a gas that is used by dentists to keep patients from feeling pain

nitrous oxide

noun

Medical Definition of nitrous oxide

: a colorless gas N2O that when inhaled produces loss of sensibility to pain preceded by exhilaration and sometimes laughter and is used especially as an anesthetic in dentistry

called also laughing gas

More from Merriam-Webster on nitrous oxide

Britannica.com: Encyclopedia article about nitrous oxide

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