iodine-125

iodine-125
Radioactive iodine isotope that decays by K-capture (internal conversion) with a half-life of 59.4 days; used as a label in immunoassay and in imaging; formerly used as a tracer in thyroid studies and as a label in imaging.

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iodine-125 -.wən-.twen(t)-ē-'fīv n a light radioactive isotope of iodine that has a mass number of 125 and a half-life of 60 days, gives off soft gamma rays, and is used as a tracer in thyroid studies and as therapy in hyperthyroidism

Medical dictionary. 2011.

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  • atomic number 53 — noun a nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small quantities (as in sea water or rocks) • Syn: ↑iodine, ↑iodin, ↑I • Derivationally related …   Useful english dictionary

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