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radioactive clock |
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radioactive clock [¦rād·ē·ō′ak·tiv ′kläk] (nuclear physics) A radioactive isotope such as potassium-40 which spontaneously decays to a stable end product at a constant rate, allowing absolute geologic age to be determined. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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