carbon dioxide
noun
: a heavy colorless gas CO2 that does not support combustion, dissolves in water to form carbonic acid, is formed especially in animal respiration and in the decay or combustion of animal and vegetable matter, is absorbed from the air by plants in photosynthesis, and is used in the carbonation of beverages
Examples of carbon dioxide in a Sentence
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Efficiency could improve further by capturing carbon dioxide or adding green hydrogen during production.
—
Neetika Walter, Interesting Engineering, 12 Nov. 2025
This exhaust system converts pollutants (hydrocarbons, carbon monoxide and nitrogen oxides) into compounds that already make up our atmosphere (nitrogen, oxygen, carbon dioxide and water).
—Clare Mulroy, USA Today, 12 Nov. 2025
The enhanced blood flow also helps flush out metabolic waste, including carbon dioxide and residual lactic acid, which can accumulate in sore muscles and contribute to stiffness or discomfort.
—Jakob Roze, Health, 11 Nov. 2025
Methane contributes more to climate change than any other gas except carbon dioxide, according to the California Air Resources Board.
—David Garrick, San Diego Union-Tribune, 11 Nov. 2025
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Neetika Walter, Interesting Engineering, 12 Nov. 2025
This exhaust system converts pollutants (hydrocarbons, carbon monoxide and nitrogen oxides) into compounds that already make up our atmosphere (nitrogen, oxygen, carbon dioxide and water).
—Clare Mulroy, USA Today, 12 Nov. 2025
The enhanced blood flow also helps flush out metabolic waste, including carbon dioxide and residual lactic acid, which can accumulate in sore muscles and contribute to stiffness or discomfort.
—Jakob Roze, Health, 11 Nov. 2025
Methane contributes more to climate change than any other gas except carbon dioxide, according to the California Air Resources Board.
—David Garrick, San Diego Union-Tribune, 11 Nov. 2025
See All Example Sentences for carbon dioxide
Cite this Entry
“Carbon dioxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/carbon%20dioxide. Accessed 13 Nov. 2025.
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