radioisotope

Noun
  1. A radioactive isotope of an element;
    Produced either naturally or artificially (synset 114644035)
    is a type of: isotope - one of two or more atoms with the same atomic number but with different numbers of neutrons
    subtypes:
    • tracer - (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes
    • label - a radioactive isotope that is used in a compound in order to trace the mechanism of a chemical reaction
    • iodine-131 - heavy radioactive isotope of iodine with a half-life of 8 days; used in a sodium salt to diagnose thyroid disease and to treat goiter
    • iodine-125 - 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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