radioiodine

radioiodine
/ray'dee oh uy"euh duyn', -din, -deen'/, n. Chem.
any of nine radioisotopes of iodine, esp. iodine 131 and iodine 125, used as radioactive tracers in research and clinical diagnosis and treatment.
[1935-40; RADIO- + IODINE]

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Universalium. 2010.

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