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

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The other measures the company is proposing include improvements to its fluidized catalytic-cracking units, which help turn crude oil into gasoline, and installing carbon monoxide analyzers to ensure equipment is running efficiently. Noelle Phillips, Denver Post, 16 Aug. 2025 Three others who were in the boat with Maisy also were treated for carbon monoxide poisoning, authorities said. Mike Stunson, Kansas City Star, 30 July 2025 For years, the Norwegian company sold its products, which also include smart thermostats, smart lighting, and smart fire and carbon monoxide alarms, for a one-time fee that included access to its companion app and cloud platform for control and automation. Scharon Harding, ArsTechnica, 28 July 2025 Similarly to smoke detectors, a carbon monoxide detector will produce a quiet chirp when the battery is low. Kamron Sanders, Better Homes & Gardens, 24 June 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 27 Aug. 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

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