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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
Air and road travel halted; schools shut down Officials in affected states in the South cautioned people to stay off the roads, keep faucets dripping to prevent pipes from freezing, check batteries in smoke and carbon monoxide detectors and refrain from using cooking stoves to heat homes.
—Karina Tsui, CNN, 21 Jan. 2025
According to 10 News First, the fire department confirmed to Shelley that her son died from carbon monoxide poisoning in the wildfire.
—Escher Walcott, People.com, 11 Jan. 2025
According to 10 News First, firefighters told the mother that her son died from carbon monoxide poisoning in the wildfire.
—Minyvonne Burke, NBC News, 11 Jan. 2025
Generators and grills should not be used indoors to avoid the risk of carbon monoxide poisoning, the NWS has warned.
—Kevin Lynn, Newsweek, 8 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 31 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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