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Definition of Nitrogen-15
1. Noun. (isotope) A minor stable isotope of nitrogen, (nuclide 15 7 N), having seven protons and eight neutrons; it accounts for less than 0.4% of the natural element; it is used in nuclear magnetic resonance spectroscopy ¹
¹ Source: wiktionary.com
Medical Definition of Nitrogen-15
1. The less common stable nitrogen isotope, making up 0.37% of natural nitrogen. Synonym: heavy nitrogen. (05 Mar 2000)