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

In particular, Pruitt set his sights on rolling back the Clean Power Plan, the Obama administration’s signature climate change policy that targeted carbon dioxide emissions from power plants. Umair Irfan, Vox, "Scott Pruitt is leaving behind a toxic mess at the EPA," 6 July 2018 One of Germany’s goals was to reduce carbon dioxide emissions by 40 percent from 1990 levels by 2020. Avery Thompson, Popular Mechanics, "Germany Likely to Miss Emissions Target for 2020," 18 June 2018 Buildings consume 73 percent of the electricity in the U.S., and indirectly create 38 percent of carbon dioxide emissions—more than industry or transportation. National Geographic, "From Historic to Cutting Edge: Revitalizing Iconic Buildings," 25 May 2018 The shipping industry agreed in April to cut its total carbon dioxide emissions in half by 2050. Mejs Hasan, WIRED, "The Ultimate Carbon-Saving Tip? Travel by Cargo Ship," 12 July 2018 The samples are measured automatically for oxygen, temperature, salinity and carbon dioxide which indicates the acidity of the water. Laine Welch, Anchorage Daily News, "For Alaska sockeye salmon, record highs in Bristol Bay, record lows nearly everywhere else," 9 July 2018 Attend the evening session and try unfiltered and unpasteurized beer with no nitrogen or carbon dioxide added. Kari Bodnarchuk, BostonGlobe.com, "Here, there, and everywhere," 6 June 2018 The history of the solar system is revealed through the examination of such planetary ices as water, methane and carbon dioxide. Marcia Bartusiak, WSJ, "‘Chasing New Horizons’ and ‘Discovering Pluto’ Reviews: Big Lessons From a Tiny World," 11 May 2018 These possible hints of life on other planets include atmospheric oxygen, methane, carbon dioxide and water vapor. Jay Bennett, Popular Mechanics, "SpaceX Launch of NASA's TESS Space Telescope Scrubbed Until Wednesday (Updated)," 16 Apr. 2018

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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Last Updated

22 Sep 2018

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Time Traveler for carbon dioxide

The first known use of carbon dioxide was in 1867

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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

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