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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Officials say that output would reduce carbon dioxide emissions by roughly 16 million metric tons each year, equivalent to replacing more than 6 million tons of standard coal.
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Kapil Kajal, Interesting Engineering, 1 Jan. 2026
On a shorter-term basis, the company is also pushing to reduce absolute carbon dioxide equivalent emissions from 40 million metric tons to 29 million in 2030 to stay aligned with Science Based Targets initiative (SBTi) requirements.
—Glenn Taylor, Sourcing Journal, 31 Dec. 2025
In the neck, the carotid artery houses a patch of cells that are sensitive to the levels of oxygen, carbon dioxide and other molecules.
—The New York Times News Service Syndicate, San Diego Union-Tribune, 30 Dec. 2025
Water that sits uncovered can develop a slightly off taste due to a change in pH from carbon dioxide exposure.
—Christina Manian, Better Homes & Gardens, 29 Dec. 2025
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Kapil Kajal, Interesting Engineering, 1 Jan. 2026
On a shorter-term basis, the company is also pushing to reduce absolute carbon dioxide equivalent emissions from 40 million metric tons to 29 million in 2030 to stay aligned with Science Based Targets initiative (SBTi) requirements.
—Glenn Taylor, Sourcing Journal, 31 Dec. 2025
In the neck, the carotid artery houses a patch of cells that are sensitive to the levels of oxygen, carbon dioxide and other molecules.
—The New York Times News Service Syndicate, San Diego Union-Tribune, 30 Dec. 2025
Water that sits uncovered can develop a slightly off taste due to a change in pH from carbon dioxide exposure.
—Christina Manian, Better Homes & Gardens, 29 Dec. 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 4 Jan. 2026.
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