HyperDic: radioisotope

English > 1 sense of the word radioisotope:
NOUNsubstanceradioisotopea radioactive isotope of an element
English > radioisotope: 1 sense > noun 1, substance
MeaningA radioactive isotope of an element; produced either naturally or artificially.
Narroweriodine-125light radioactive isotope of iodine with a half-life of 60 days
iodine-131Heavy radioactive isotope of iodine with a half-life of 8 days
labelA radioactive isotope that is used in a compound in order to trace the mechanism of a chemical reaction
tracer(radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes
BroaderisotopeOne of two or more atoms with the same atomic number but with different numbers of neutrons

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