a colorless, tasteless, odorless, gaseous chemical element forming nearly four fifths of the atmosphere: it is a component of all proteins and nucleic acids: symbol, N; at. no. 7
Origin of nitrogenFrench nitrogène: so named (1790) by J. A. Chaptal (1756-1832), French chemist ; from Classical Greek nitron (see niter) + French -gène, -gen, because niter resulted when it was sparked with oxygen in the presence of caustic potash
A nonmetallic element that constitutes nearly four-fifths of the air by volume, occurring as a colorless, odorless, almost inert diatomic gas, N2, in various minerals and in all proteins and used in a wide variety of applications, including manufacture of ammonia, nitric acid, TNT, and fertilizers, and as a cryogen. Atomic number 7; atomic weight 14.0067; melting point −210.00°C; boiling point −195.80°C; valence 2, 3, 4, 5. See Periodic Table.
Origin of nitrogenFrench nitrogène : nitro-, nitric acid (from New Latin; see nitro–) + -gène, -gen.
(countable and uncountable, plural nitrogens)
- (uncountable) A chemical element (symbol N) with an atomic number of 7 and atomic weight of 14.0067.
- (uncountable) Molecular nitrogen (N2), a colorless, odorless gas at room temperature.
- (countable) A specific nitrogen within a chemical formula, or a specific isotope of nitrogen
- The two nitrogens are located next to one another on the ring.
From French nitrogÃ¨ne (coined by Lavoisier), corresponding to nitro- + -gen.