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 April 2, Randall Zúñiga — director of the Judicial Investigation Agency in Costa Rica — confirmed with The Associated Press that Miller’s death was a result of carbon monoxide poisoning. Ryan Brennan, Miami Herald, 3 Apr. 2025 Home security systems and carbon monoxide detection: What to know now Carbon monoxide poisoning kills hundreds of Americans each year. Aimee Picchi, CBS News, 1 Apr. 2025 Winter is the most dangerous time for carbon monoxide poisoning, as home heating systems run for hours. Saleen Martin, USA Today, 1 Apr. 2025 LokMan Sung, medical examiner of Wayne County, Mich., said two homeless Detroit children who died while inside an unheated van parked in a casino garage perished due to accidental carbon monoxide toxicity, not hypothermia. arkansasonline.com, 12 Mar. 2025 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 21 Apr. 2025.

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

More from Merriam-Webster on carbon monoxide

Last Updated: - Updated example sentences
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