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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However, during warm periods the carbon monoxide would have changed back to carbon dioxide. Robert Lea, Space.com, 30 Jan. 2025 Jessel has been nearly as silent and odorless as carbon monoxide this whole season, and finally, the fighter in her is snapped to the front. Brian Moylan, Vulture, 28 Jan. 2025 And in 2023 alone, Massachusetts fire departments reported finding carbon monoxide at nearly 5,000 non-fire incidents. Joe Dwinell, Boston Herald, 23 Jan. 2025 When a device detects a house fire or carbon monoxide, customers will be notified via the Ring app on top of the usual alarm sound so people inside and outside the house will know when something is amiss. Joe Hindy, PCMAG, 6 Jan. 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

Dictionary Entries Near carbon monoxide

Cite this Entry

“Carbon monoxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/carbon%20monoxide. Accessed 12 Feb. 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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