carbon 14

carbon 14
noun
a radioactive isotope of carbon
Syn: ↑radiocarbon
Hypernyms: ↑carbon, ↑C, ↑atomic number 6

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noun
: a heavy radioactive isotope of carbon having the mass number 14 that is formed by the action of cosmic rays on nitrogen in the atmosphere and made artificially by bombardment of nitrogen compounds with neutrons and is valuable in tracer studies in chemistry and biology and in dating archaeological and geological materials — symbol C14 or 14C — called also radiocarbon

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radiocarbon (def. 1).
Also, carbon-14 /kahr"beuhn fawr teen", -fohr-/.
[1935-40]

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carbon 14,
a radioactive isotope of carbon produced by the bombardment of nitrogen atoms by neutrons; radiocarbon. Since carbon 14 gives off radioactivity at a uniform rate in all animals and plants that have died, scientists are able to find out the age of many ancient remains of living things, or of geological formations in which organic matter occurs, by measuring the amount of carbon 14 left in them. Symbol: C14.

Useful english dictionary. 2012.

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