iodine-131

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Related to I 131: iodine 131

iodine-131

[′ī·ə‚dīn ¦wən¦thərd·ē′wən]
(nuclear physics)
A radioactive, artificial isotope of iodine, mass number 131; its half-life is 8 days with beta and gamma radiation; used in medical and industrial radioactive tracer work; moderately radiotoxic.