carbon dioxide

noun

Definition of carbon dioxide

: 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

Recent Examples on the Web This slow, deep breathing rebalances the amounts of oxygen and carbon dioxide in your blood and disengages the primitive fight or flight response. John Hudson, Wired, "If You Are Going to Survive, You Must Prepare to Fail," 11 Jan. 2021 Increasing indoor ventilation and measuring the exchange of fresh air using carbon dioxide monitors could be key to curbing the spread of the coronavirus. Tony Barboza Staff Writer, Los Angeles Times, "Essential California: The post-holiday surge is afoot," 6 Jan. 2021 When the forest is cut and replaced with crops, more carbon dioxide accumulates in the atmosphere, accelerating climate change. Washington Post, "How wood shaped human history, from spears to boats to books," 31 Dec. 2020 Berman knocked on doors for the Liberal Party in Vancouver and was elated when Trudeau formed a government promising to implement a national price on carbon dioxide. Geoff Dembicki, The New Republic, "Will Joe Biden Betray the Climate Movement Like Justin Trudeau Did?," 31 Dec. 2020 Types of ablative treatments — which are more intense than nonablative lasers and require more downtime — include the carbon dioxide laser. Julie Ricevuto, Allure, "The Science of Beauty: The Complete Guide to Laser Treatments for Hair and Skin," 30 Dec. 2020 For example, a round-trip flight to a city 1,000 miles away, such as from Chicago to Denver, emits about 0.3 tons per passenger or 1.19 tons of carbon dioxide total for a family of four, according to the International Civil Aviation Organization. London Gibson, The Indianapolis Star, "If you choose to fly, here's how you can do it in a greener way," 30 Dec. 2020 The researchers then collected and incubated microbes from both locations in a refrigerator and provided them with hydrogen and carbon dioxide. Kate Baggaley, Popular Science, "Glacier-dwelling bacteria thrive on chemical energy derived from rocks and water," 30 Dec. 2020 Energy expenditure is calculated by measuring the amount of oxygen used, and carbon dioxide released by the body. Terezie Tolar-peterson, The Conversation, "Whether slow or fast, here’s how your metabolism influences how many calories you burn each day," 28 Dec. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'carbon dioxide.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of carbon dioxide

1867, in the meaning defined above

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Time Traveler for carbon dioxide

Time Traveler

The first known use of carbon dioxide was in 1867

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Statistics for carbon dioxide

Last Updated

19 Jan 2021

Cite this Entry

“Carbon dioxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/carbon%20dioxide. Accessed 21 Jan. 2021.

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More Definitions for carbon dioxide

carbon dioxide

noun

English Language Learners Definition of carbon dioxide

: a gas that is produced when people and animals breathe out or when certain fuels are burned and that is used by plants for energy

carbon dioxide

noun
carbon di·​ox·​ide | \ -dī-ˈäk-ˌsīd \

Kids Definition of carbon dioxide

: a heavy colorless gas that is formed by burning fuels, by the breakdown or burning of animal and plant matter, and by the act of breathing and that is absorbed from the air by plants in photosynthesis

carbon dioxide

noun

Medical Definition of carbon dioxide

: 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

More from Merriam-Webster on carbon dioxide

Britannica.com: Encyclopedia article about carbon dioxide

Comments on carbon dioxide

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