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 oxide

Examples of nitrous oxide in a Sentence

Recent Examples on the Web Though his downfall, involving nitrous oxide, makes for the show’s most authentically unnerving scene, the character is mostly played for laughs. Sophia Nguyen, Washington Post, 21 Mar. 2024 Earlier this week, authorities said that the building was not supposed to contain the butane and nitrous oxide tanks that were found on the property. Kylie Martin, Detroit Free Press, 8 Mar. 2024 See all Example Sentences for nitrous oxide 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'nitrous oxide.' 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

1798, in the meaning defined above

Time Traveler
The first known use of nitrous oxide was in 1798

Dictionary Entries Near nitrous oxide

Cite this Entry

“Nitrous oxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nitrous%20oxide. Accessed 29 May. 2024.

Kids Definition

nitrous oxide

noun
: a colorless gas that when inhaled causes loss of the ability to feel pain and sometimes produces laughter and is used especially in dentistry

called also laughing gas

Medical Definition

nitrous oxide

noun
: 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

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