carbon monoxide

noun

: a colorless odorless very toxic gas CO that is formed as a product of the incomplete combustion of carbon or a carbon compound

Examples of carbon monoxide in a Sentence

Recent Examples on the Web
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On the eve of a federal jury trial, Toyota has settled a lawsuit blaming it for the fatal carbon monoxide poisoning of an Atlanta man, the AJC’s Rosie Manins reports. Adam Beam, AJC.com, 27 May 2026 The explosion's force opened a door between the garage and the living area, allowing smoke and carbon monoxide to spread throughout the home, crews said. Joseph Buczek, CBS News, 27 May 2026 Do have a carbon monoxide detector. Richard Tribou, The Orlando Sentinel, 24 May 2026 Ethanol contains more oxygen than gasoline, which means ethanol blends release fewer toxic carbon monoxide emissions from tailpipes. Stephanie Pappas, Scientific American, 22 May 2026 See All Example Sentences for carbon monoxide

Word History

First Known Use

1868, in the meaning defined above

Time Traveler
The first known use of carbon monoxide was in 1868

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Cite this Entry

“Carbon monoxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/carbon%20monoxide. Accessed 2 Jun. 2026.

Kids Definition

carbon monoxide

noun
: a colorless odorless very poisonous gas formed by the incomplete burning of carbon

Medical Definition

carbon monoxide

noun
: a colorless odorless very toxic gas CO that burns to carbon dioxide with a blue flame and is formed as a product of the incomplete combustion of carbon

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