carbon dioxide

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Alternative forms[edit]


  • (UK) IPA(key): /ˌkɑːbən dʌɪˈɒksʌɪd/
  • (US) IPA(key): /ˈˌkɑrbən daɪˈɑksaɪd/
  • (file)


carbon dioxide (uncountable)

  1. (inorganic chemistry) The normal oxide of carbon, CO₂; a colorless, odorless gas formed during respiration and combustion and consumed by plants during photosynthesis.
    Synonyms: carbonic acid gas, CO₂, (acidity regulator) E290
    Hypernym: greenhouse gas
    Coordinate term: carbon monoxide
    • 2008 December 9, Jeff Jacoby, “Skepticism on climate change”, in The International Herald Tribune[1], →ISSN:
      There were dozens of presentations in 2008, including: [] "The Overstated Role of Carbon Dioxide on Climate Change."
    • 2013 September–October, Katie L. Burke, “In the News”, in American Scientist[2], archived from the original on 2013-09-03:
      Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis: the ability to convert water and carbon dioxide into carbohydrates and waste oxygen using solar energy.

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