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radioactive decay
radioactive series
radioactive tracer
radioactive waste
radioactivity
radiobiology
radiobroadcasting
radiocarbon
radiocarbon dating
radiochemistry
radioelement
radiogenic
radiogram
radiograph
radioimmunoassay
radioiodine
radioisotope
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radiometric dating
ra·di·o·met·ric dat·ing


noun 
Definition:
 
determining age using radioactive decay rates: a method of determining the age of objects or material using the decay rates of radioactive components such as potassium-argon
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