mon·​ox·​ide | \ mə-ˈnäk-ˌsīd How to pronounce monoxide (audio) \

Definition of monoxide

: an oxide containing one atom of oxygen in a molecule

Examples of monoxide in a Sentence

Recent Examples on the Web The first is to call in someone to inspect their furnace, and the second is to buy a carbon-monoxide detector. Heloise, Washington Post, "Hints From Heloise: The cost of participation," 25 Oct. 2019 Perhaps, some people thought, the women had lit their camp stove in their tent and died of carbon-monoxide poisoning. Rachel Monroe, Outside Online, "Last winter, Moroccan officials found two hikers dead on the trail to the highest peak in the Atlas Mountains. The international investigation that followed revealed the fragility of the adventure travel economy, as well as what happens when a small tourist hub is suddenly made strange by violence.," 29 July 2019 Now, one in 10 young adults want regulators to ban dihydrogen monoxide from food and beverages, according to a study by research firm InsightsNow. Heather Haddon, WSJ, "Anyone for Diglycerides? Anyone? Food Scientists Are Getting Fed Up With Picky Eaters," 12 Oct. 2018 Plus, information in several languages about the dangers of carbon-monoxide poisoning. Christine Clarridge, The Seattle Times, "Snow, ice, school closures in Seattle area — and there’s more on the way," 5 Feb. 2019 His drinking precipitously descends from country-club conviviality to solitary stupor, and the novel ends with his suicide by carbon-monoxide inhalation in his Cadillac, a clean, modern way to go. Jamie James, WSJ, "‘John O’Hara: Four Novels of the 1930s’ Review: Big Fish in Small Towns," 3 Jan. 2019 Authorities in the state later reported two more deaths from carbon-monoxide poisoning caused by a generator. Valerie Bauerlein, WSJ, "Florence Flooding Threatens to Last for Days," 16 Sep. 2018 Combined detector: Buy combined smoke and carbon-monoxide detectorsand you're covered for both types of danger. The Editors Of House Beautiful, House Beautiful, "How to Install a Smoke Detector," 12 Feb. 2015 Homes with real fires or natural gas supply: as above, with additional carbon-monoxide alarm. The Editors Of House Beautiful, House Beautiful, "How to Install a Smoke Detector," 12 Feb. 2015

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

1868, in the meaning defined above

History and Etymology for monoxide

International Scientific Vocabulary

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Time Traveler for monoxide

Time Traveler

The first known use of monoxide was in 1868

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Statistics for monoxide

Cite this Entry

“Monoxide.” The Dictionary, Merriam-Webster Inc., Accessed 29 January 2020.

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More Definitions for monoxide


mon·​ox·​ide | \ mə-ˈnäk-ˌsīd How to pronounce monoxide (audio) \

Medical Definition of monoxide

: an oxide containing one atom of oxygen per molecule — see carbon monoxide

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More from Merriam-Webster on monoxide

Rhyming Dictionary: Words that rhyme with monoxide

Spanish Central: Translation of monoxide

Nglish: Translation of monoxide for Spanish Speakers

Britannica English: Translation of monoxide for Arabic Speakers

Comments on monoxide

What made you want to look up monoxide? Please tell us where you read or heard it (including the quote, if possible).


to assert without proof or before proving

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