carbon-date
verb
• determine the age or date of (organic matter) from the relative proportions of the carbon isotopes carbon-12 and carbon-14 that it contains.
• "it proved impossible to carbon-date the bone fragment accurately"
carbon-date
noun
• the age or date of organic matter as determined by the relative proportions of the carbon isotopes carbon-12 and carbon-14 that it contains.
• "the carbon dates were all in the last 5,000 to 10,000 years"
