수소의 방사성 동위 원소의 하나로, 원자핵이 양성자 하나와 중성자 두 개로 구성되어 일반 수소보다 질량이 약 3배 무거운 원소.
A radioactive isotope of hydrogen with a nucleus containing one proton and two neutrons, having an atomic mass approximately three times that of ordinary hydrogen.
예문:
"Tritium is used as a fuel source in experimental nuclear fusion reactors."
"The watch hands glow in the dark thanks to a small amount of radioactive tritium."
"Environmental scientists track tritium concentrations to study the movement of groundwater."