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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
If your vehicle is running, scrape away any snow or debris from the exhaust pipe to prevent carbon monoxide build up inside the car.
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Martha Quillin, Charlotte Observer, 19 Feb. 2025
They are typically used to treat decompression sickness for scuba divers, carbon monoxide poisoning, gangrene and certain kinds of wounds or injuries that won't heal on their own, according to Johns Hopkins.
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Audrey Conklin, Fox News, 18 Feb. 2025
One of the most common forms of carbon monoxide exposure occurs through unvented space heaters.
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Dan Perry, Newsweek, 12 Feb. 2025
That helps protect against carbon monoxide poisoning.
—
Mara Hoplamazian, NPR, 9 Jan. 2025
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Word History
First Known Use
1868, in the meaning defined above
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 25 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
Britannica.com: Encyclopedia article about carbon monoxide
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