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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Meanwhile, the biogas itself contains large amounts of carbon dioxide – often around 35% to 40% – reducing its direct usefulness as a fuel and requiring additional upgrading before it can be injected into natural gas infrastructure as renewable natural gas.
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New Atlas, 9 May 2026
Researchers in China have developed a new fermentation system that boosts biohydrogen production while capturing carbon dioxide.
—Prabhat Ranjan Mishra, Interesting Engineering, 9 May 2026
And while the law largely governs toxins, the rollback has also undermined action on climate change, including repealing the legal theory used to classify greenhouse gas emissions like carbon dioxide as regulated pollutants.
—Mark Olalde, ProPublica, 8 May 2026
When these two ingredients mix, a powerful reaction occurs that creates carbon dioxide which helps to break through whatever is clogging your drain.
—Ashlyn Needham, Southern Living, 8 May 2026
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New Atlas, 9 May 2026
Researchers in China have developed a new fermentation system that boosts biohydrogen production while capturing carbon dioxide.
—Prabhat Ranjan Mishra, Interesting Engineering, 9 May 2026
And while the law largely governs toxins, the rollback has also undermined action on climate change, including repealing the legal theory used to classify greenhouse gas emissions like carbon dioxide as regulated pollutants.
—Mark Olalde, ProPublica, 8 May 2026
When these two ingredients mix, a powerful reaction occurs that creates carbon dioxide which helps to break through whatever is clogging your drain.
—Ashlyn Needham, Southern Living, 8 May 2026
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 11 May. 2026.
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