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deuterium noun

  /djuːˈtɪəɹɪəm/ , /djuːˈtɪɹi.əm/ , /dʒuːˈtɪəɹɪəm/
  • (uncountable, isotope) An isotope of hydrogen with one proton and one neutron in each atom - 21H.
 deuterio
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