Meaning of uranium lead in English:
uranium lead
noun
1The isotope lead-206; = "radium G".
2Attributive (uranium-lead) designating a method of isotopic dating of rock based on measurement of the relative amounts of uranium-238 and -235 and of their ultimate decay products lead-206 and -207; (of dates, ages, etc.) obtained using this method.
Origin
Early 20th century.
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