carbon 14

noun

Definition of carbon 14 

: a heavy radioactive isotope of carbon of mass number 14 used especially in tracer studies and in dating old materials (such as archaeological and geological specimens)

First Known Use of carbon 14

1946, in the meaning defined above

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The first known use of carbon 14 was in 1946

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carbon 14

noun
\-(ˈ)fōr(t)-ˈtēn, -(ˈ)fȯr(t)- \

Medical Definition of carbon 14 

: a heavy radioactive isotope of carbon of mass number 14 used especially in tracer studies and in dating archaeological and geological materials

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