Dictionary

tritium

noun tri·ti·um \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
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Origin of TRITIUM

New Latin, from Greek tritos third — more at third
First Known Use: 1933
Medical Dictionary

tritium

noun tri·ti·um \ˈtrit-ē-əm, ˈtrish-ē-\

Medical Definition of TRITIUM

:  a radioactive isotope of hydrogen with atoms of three times the mass of ordinary light hydrogen atoms—symbol T

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