deuterium
noun/djuːˈtɪriəm/
Frequency rank: #17,709 of 20,003 in the WORDED list (wordfreq data)
Meaning
A stable isotope of hydrogen whose nucleus contains one proton and one neutron, making it twice as heavy as ordinary hydrogen.
Example sentence
Scientists used deuterium instead of regular hydrogen to trace the movement of water molecules in the experiment.
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