SYN: hydrogen-3.
* * *
tri·ti·um 'trit-ē-əm, 'trish-ē- n a radioactive isotope of hydrogen with atoms of three times the mass of ordinary light hydrogen atoms symbol T
* * *
trit·i·um (3H) (tritґe-əm) [Gr. tritos third] the mass three isotope of hydrogen, a radioactive gas with a half-life of 12.33 years and emitting beta particles (0.0186 MeV); it has been used as a tracer in metabolic studies. Cf. deuterium and protium.Medical dictionary. 2011.