CO2 - Definition, Meaning & Synonyms

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SKIP TO CONTENT CO2 Definitions of CO2

noun a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in photosynthesis synonyms: carbon dioxide, carbonic acid gas see moresee less types: blackdamp, chokedamp the atmosphere in a mine following an explosion; high in carbon dioxide and incapable of supporting life type of: dioxide an oxide containing two atoms of oxygen in the molecule greenhouse emission, greenhouse gas a substance in the air that warms a planet by trapping heat

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