tritium

Meanings

1. 1
   noun

   a radioactive isotope of hydrogen whose nucleus contains one proton and two neutrons; symbol 3H or T

   A fusion experiment may use tritium together with deuterium as fuel.

From New Latin tritium, formed from Greek tritos ("third") + -ium. The name refers to its mass number of three, distinguishing it from ordinary hydrogen and deuterium.

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