carbon 13

noun

Definition of carbon 13

: an isotope of carbon of mass number 13 that constitutes about ¹/₇₀ of natural carbon and is used as a tracer especially in spectroscopy utilizing nuclear magnetic resonance

Examples of carbon 13 in a Sentence

Recent Examples on the Web This means that regions that once harbored photosynthetic life contain slightly lower amounts of carbon 13 than sterile areas. Peter Byrne, Quanta Magazine, "Early Life in Death Valley," 24 Apr. 2014

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'carbon 13.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of carbon 13

1936, in the meaning defined above

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The first known use of carbon 13 was in 1936

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Cite this Entry

“Carbon 13.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/carbon%2013. Accessed 10 December 2019.

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