carbon dioxide

carbon dioxide
a) The normal oxide of carbon, CO; a colorless, odorless gas formed during respiration and combustion and consumed by plants during photosynthesis.
b) Compared to carbon monoxide, CO is a non-toxic gas, similar to the inert gases. Carbon dioxide is used on welding and lasers; unlike noble gases, it only reacts on water and minerals to produce carbonates and carbonic acid (chiefly referred as carbonation).
Syn: carbonic acid gas, CO₂, E290, acidity regulator

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  • carbon dioxide — n a heavy colorless gas CO2 that does not support combustion, dissolves in water to form carbonic acid, is formed esp. in animal respiration and in the decay or combustion of animal and vegetable matter, is absorbed from the air by plants in… …   Medical dictionary

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  • carbon dioxide — n. a colorless, odorless, incombustible gas, CO2, somewhat heavier than air, that is a product of respiration and combustion: produced commercially and used widely in fire extinguishers, carbonated beverages, etc.: in photosynthesis, carbon… …   English World dictionary

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  • Carbon dioxide — Dioxide Di*ox ide (?; 104), n. [Pref. di + oxide.] (Chem.) (a) An oxide containing two atoms of oxygen in each molecule; binoxide. (b) An oxide containing but one atom or equivalent of oxygen to two of a metal; a suboxide. [Obs.] [1913 Webster]… …   The Collaborative International Dictionary of English

  • carbon dioxide — 1873, so called because it consists of one carbon and two oxygen atoms. Known since mid 18c. under the name fixed air …   Etymology dictionary

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  • carbon dioxide — a 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… …   Universalium

  • carbon dioxide — noun a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in photosynthesis (Freq. 1) • Syn: ↑CO2, ↑carbonic acid gas • Derivationally related forms: ↑carbonate • …   Useful english dictionary

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