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 Blue = winter and low carbon 13/low bone cell density. Jennifer Ouellette, Ars Technica, 23 Feb. 2022 Yellow = summer and high carbon 13/high bone density. Jennifer Ouellette, Ars Technica, 23 Feb. 2022 Carbon has two stable isotopes, measured as either carbon 12 or carbon 13. Ashley Strickland, CNN, 17 Jan. 2022 Recent separate findings indicate that plant leaves receiving more light have a higher density of veins, as well as a higher ratio of a naturally occurring isotope called carbon 13. Rachel Nuwer, Scientific American, 1 Apr. 2021 Chemically, carbon 14 behaves exactly like its stable siblings (carbon 12 and carbon 13), allowing plants to absorb it during photosynthesis and then pass it up the food chain. Scott Hershberger, Scientific American, 4 Aug. 2020 So researchers compare the amount of carbon 14 with the levels of carbon 12 and carbon 13 to determine how much time has passed since an organism perished. Scott Hershberger, Scientific American, 4 Aug. 2020 This means that regions that once harbored photosynthetic life contain slightly lower amounts of carbon 13 than sterile areas. Peter Byrne, Quanta Magazine, 24 Apr. 2014 See More

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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Time Traveler for carbon 13

Time Traveler

The first known use of carbon 13 was in 1936

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Dictionary Entries Near carbon 13

carbon 12

carbon 13

carbon 14

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Statistics for carbon 13

Last Updated

7 Apr 2022

Cite this Entry

“Carbon 13.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/carbon%2013. Accessed 18 May. 2022.

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