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radiocarbon

[rey-dee-oh-kahr-buh n]
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noun Chemistry.
  1. Also called carbon 14. a radioactive isotope of carbon with mass number 14 and a half-life of about 5730 years: widely used in the dating of organic materials.
  2. any radioactive isotope of carbon.
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Origin of radiocarbon

First recorded in 1935–40; radio- + carbon
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for radio-carbon

radiocarbon

noun
  1. a radioactive isotope of carbon, esp carbon-14See carbon (def. 1)
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for radio-carbon

n.

"Carbon-14," 1940, from radio-, comb. form of radioactive, + carbon. Radio-carbon dating is attested from 1949.

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Online Etymology Dictionary, © 2010 Douglas Harper

radio-carbon in Science

radiocarbon

[rā′dē-ō-kärbən]
  1. A radioactive isotope of carbon, especially carbon 14. Other radiocarbons include carbon 10, carbon 11, carbon 15, and carbon 16.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.