oxygen

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The Simple English Wikipedia has an article on:

nitrogen 8 fluorine

Pronunciation[change]

Noun[change]

Singular
oxygen

Plural
oxygens

  1. (uncountable) Oxygen is a chemical element (symbol O) with an atomic number of 8.
  2. (uncountable) Oxygen is a type of gas.
  3. (countable) An oxygen is an atom of the element oxygen.