iodine-125

Definitions of iodine-125
  1. noun
    light radioactive isotope of iodine with a half-life of 60 days; used as a tracer in thyroid studies and as a treatment for hyperthyroidism
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    type of:
    radioisotope
    a radioactive isotope of an element; produced either naturally or artificially
    I, atomic number 53, iodin, iodine
    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)
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