oxygen

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English[edit]

Chemical element
O Previous: nitrogen (N)
Next: fluorine (F)

Etymology[edit]

Borrowed from French oxygène (originally in the form principe oxygène, a variant of principe oxigine ‘acidifying principle’, suggested by Lavoisier), from Ancient Greek ὀξύς (oksús, sharp) + γένος (génos, birth), referring to oxygen's role in the formation of acids.

Pronunciation[edit]

  • IPA(key): /ˈɒksɪd͡ʒən̩/
  • (file)

Noun[edit]

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Wikipedia

oxygen (countable and uncountable, plural oxygens)

  1. A chemical element (symbol O) with an atomic number of 8 and relative atomic mass of 15.9994.
  2. Molecular oxygen (O2), a colorless, odorless gas at room temperature.
    • 2013 September-October, Katie L. Burke, “In the News”, American Scientist: 
      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. The evolutionary precursor of photosynthesis is still under debate, and a new study sheds light.
  3. (medicine) A mixture of oxygen and other gases, administered to a patient to help him or her to breathe.
  4. (countable) An atom of this element.

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Danish[edit]

Noun[edit]

oxygen n (singular definite oxygenet, not used in plural form)

  1. oxygen

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