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the mass 3 isotope of hydrogen, symbol 3H, with a half-life of 12.26 years and used as an indicator or tracer in metabolic studies.
tritium/trit·i·um/ (trit´e-um) see hydrogen.
Etymology: Gk, tritos, third
hy·dro·gen 3(3H) (hī'drō-jen)
A hydrogen isotope of atomic weight 3; weakly radioactive, emitting beta particles to become the stable helium-3; half-life, 12.32 years.
tritiuma radioactive isotope of hydrogen with an atomic mass of three (H3).
the mass 3 isotope of hydrogen, symbol 3H, obtained by bombardment of beryllium in the cyclotron with deuterium ions. It has a half-life of about 31 years, and is used as an indicator or tracer in metabolic studies. See also tritiated thymidine.