Wiktionary
nitrogen-14
n. (context isotope English) The major stable isotope of nitrogen, (nuclide 14 7 N), having seven protons and seven neutrons; it accounts for well over 99% of the natural element.
Usage examples of "nitrogen-14".
The convection cycles dug deep into the mantle to haul energy out of the core regions to be pumped out to space—and along with the energy dredging, Lieserl saw, the convection was changing the composition of the Sun, polluting the outer regions with nucleosynthesis products like nitrogen-14, dug out of the core regions.