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
Read the Latest from M-W
First Known Use of carbon 13
1936
Learn More about carbon 13
Seen and Heard
What made you want to look up carbon 13? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!