radionitrogen

ra·di·o·ni·tro·gen

(rā'dē-ō-nī'trō-jĕn),
A radioactive isotope of nitrogen; for example, 13N.

radionitrogen

A nonspecific term for a radionuclide of nitrogen; there is an increasing tendency to separate single words into respective units—e.g., radioactive nitrogen is more commonly used than radionitrogen

radionitrogen

(rād″ē-ō-nī′trŏ-jĕn) [ radio- + nitrogen]
A radioisotope of nitrogen.