from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a radioactive isotopes of carbon, 146C, having six protons and eight neutrons; it is used in radiocarbon dating
from the GNU version of the Collaborative International Dictionary of English
- n. a radioactive isotope of carbon with a half-life of 5730 years. It occurs naturally in minute quantities, and is used as the basis for radiocarbon dating.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a radioactive isotope of carbon
Sorry, no etymologies found.