Breadcrumb Home > Dictionary > Index C carbon 13: Meaning and Definition of Find definitions for: carbon 13 Pronunciation: (kär'bun thûr-tēn'). [key] the stable isotope of carbon having an atomic mass number 13, used as a tracer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. carbon 12 carbon 14 TrendingHere are the facts and trivia that people are buzzing about. Star Trek: First Contact Current Events This Week: September 2023 Countries with the Highest Literacy Rates 50 Funniest "Futurama" Quotes Dangerous Animals: Scorpions, Bears, and Poison-Dart Tree Frogs State Capitals and Largest Cities (& Some Common Questions) ✖ Related Content Daily Word Quiz: camenae Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language