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WordReference Random House Learner's Dictionary of American English © 2024car•bon di•ox•ide /daɪˈɑksaɪd/USA pronunciation n. [uncountable]- Chemistrya colorless, odorless gas formed during respiration:When we breathe out we give off carbon dioxide.
WordReference Random House Unabridged Dictionary of American English © 2024car′bon diox′ide, - Chemistrya colorless, odorless, incombustible gas, CO2, present in the atmosphere and formed during respiration, usually obtained from coal, coke, or natural gas by combustion, from carbohydrates by fermentation, by reaction of acid with limestone or other carbonates, or naturally from springs: used extensively in industry as dry ice, or carbon dioxide snow, in carbonated beverages, fire extinguishers, etc. Also called carbonic-acid gas, carbonic anhydride.
Collins Concise English Dictionary © HarperCollins Publishers:: carbon dioxide n - a colourless odourless incombustible gas present in the atmosphere and formed during respiration, the decomposition and combustion of organic compounds, and in the reaction of acids with carbonates: used in carbonated drinks, fire extinguishers, and as dry ice for refrigeration. Formula: CO2
Also called: carbonic-acid gas
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