nitrogen

  1. Noun.  (uncountable) A chemical element (''symbol'' N) with an atomic number of 7 and atomic weight of 14.0067.
  2. Noun.  (uncountable) Molecular nitrogen (N2), a colorless, odorless gas at room temperature.
  3. Noun.  (countable) A specific nitrogen within a chemical formula, or a specific isotope of nitrogen.

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This entry was last updated on RefTopia from its source on 3/20/2012.