Light water or Lightwater may refer to:

Science

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Other uses

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See also

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  • Semiheavy water, a form of water in which one of the protium atoms in light water is replaced with deuterium atoms
  • Heavy water, a form of water that contains a larger than usual amount of deuterium molecules
  • Super-heavy water, a form of water in which both protium atoms in light water are replaced with tritium atoms