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radioiodine

[ rey-dee-oh-ahy-uh-dahyn, -din, -deen ]

noun

, Chemistry.
  1. any of nine radioisotopes of iodine, especially iodine 131 and iodine 125, used as radioactive tracers in research and clinical diagnosis and treatment.


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Word History and Origins

Origin of radioiodine1

First recorded in 1935–40; radio- + iodine

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