n. a radioactive isotope of hydrogen having an atomic weight of 3 and a half-life of c. 12.5 years; it decays by beta-particle emission and is used in thermonuclear bombs; thermonuclear fusion devices; as a radioactive tracer; etc.
They used tritium in making the nuclear weapons.
They used tritium in making the nuclear weapons.
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3 syllables
trit-i-um
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