放射年代測定

ほうしゃねんだいそくてい

noun

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radiometric dating

放	set free, release, fire, shoot, emit, banish, liberate
射	shoot, shine into, onto, archery
年	year, counter for years
代	substitute, change, convert, replace, period, age, counter for decades of ages, eras, etc., generation, charge, rate, fee
測	fathom, plan, scheme, measure
定	determine, fix, establish, decide