radio-iodine

radioiodine

[rey-dee-oh-ahy-uh-dahyn, -din, -deen]
noun Chemistry.
any of nine radioisotopes of iodine, especially iodine 131 and iodine 125, used as radioactive tracers in research and clinical diagnosis and treatment.

Origin:
1935–40; radio- + iodine

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Medical Dictionary

radioiodine ra·di·o·i·o·dine (rā'dē-ō-ī'ə-dīn')
n.
A radioactive isotope of iodine widely used as a tracer.

The American Heritage® Stedman's Medical Dictionary
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