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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
Depending on what's burning – grasslands, trees, vegetation, buildings – wildfire smoke can contain chemical substances such as carbon monoxide, carbon dioxide, acid gases, sulfur dioxide, nitrogen oxides, benzene, toluene, styrene, metals and dioxins, the New York State Department of Health says.
—George Petras, USA TODAY, 10 Jan. 2025
Incinerators emit pollutants such as carbon monoxide, nitrogen oxides, and fine particulate matter, which have been associated with heart disease, respiratory problems, and cancer.
—Tribune News Service, Orlando Sentinel, 10 Jan. 2025
Generators pose a fire risk and can cause carbon monoxide poisoning.
—Dominique Sabins, Fort Worth Star-Telegram, 9 Jan. 2025
To protect from carbon monoxide poisoning, clear snow from your exhaust pipe and run the engine just enough to keep the car warm, or about 10 minutes every hour.
—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 19 Jan. 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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