tritium
tri·ti·um
noun \ˈtri-tē-əm, ˈtri-shē-\Definition of TRITIUM
: a radioactive isotope of hydrogen that has one proton and two neutrons in its nucleus and that has three times the mass of ordinary hydrogen —symbol T
See Origin of TRITIUM
New Latin, from Greek tritos third — more at third
First Known Use: 1933
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