(chemistry) The binary compound of nitrogen and iodine, NI₃; a dark red explosive solid.

(chemistry) the binary compound of nitrogen and bromine, NBr₃; a dark red explosive liquid

Nitrogen that has been cooled to the liquid state; used in cryogenics.

(chemistry) Any of a series of compounds, analogous to mustard gas with sulfur replaced by nitrogen, that have been used in the treatment of cancer.

(physics) A radioactive isotope of nitrogen, ¹³₇N, having seven protons and six neutrons, and a half-life of less than ten minutes; it is used in positron emission tomography

(physics) A stable isotope of nitrogen, ¹⁵₇N, 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

(physics) A stable isotope of nitrogen, ¹⁴₇N, having seven protons and seven neutrons; it accounts for over 99% of the natural element.

plural of nitrogen fixer

plural of nitrogen inversion

plural of nitrogen mustard