car·bon-14 
(kär′bən-fôr-tēn)
(kär′bən-fôr-tēn)n.
A naturally occurring, radioactive carbon isotope with an atomic mass of 14 and a half-life of 5,730 years, used in determining the age of ancient organic, geologic, or archaeological specimens.
- John Maynard
- (John) Michael
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- John Milton
- John Milton
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- Johnny
- "Johnny."
- "Johnny."
- johnny
- "Johnny."
- Johnny
- Johnny Appleseed
- Johnny Appleseed
- johnnycake
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