nitrogen

ni·tro·gen   (nī'trə-jən)    n.   Symbol N 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 important manufactures, including ammonia, nitric acid, TNT, and fertilizers. Atomic number 7; atomic weight 14.0067; melting point -209.86°C; boiling point -195.8°C; valence 3, 5. See Table at element. [French nitrogène : nitro-, nitric acid (from New Latin; see nitro-) + -gène, -gen.]

nitrogen

A chemical element that makes up about four-fifths of the atmosphere of the Earth. Its symbol is N.

Note: Like carbon, nitrogen is a necessary element in the tissues of living things.

nitrogen 

Main Entry: ni·tro·gen
Pronunciation: 'nI-tr&-j&n
Function: noun
: a common nonmetallic element that in the free form is normally acolorless odorless tasteless insoluble inert diatomic gas comprising 78 percent of the atmosphere by volume and that in the combined form is a constituent of biologically important compounds (asproteins, nucleic acids, and alkaloids) and hence of all living cells as well as of industrially important substances (as cyanides, fertilizers, dyes, and antibiotics) —symbol N;—see ELEMENT table

nitrogen ni·tro·gen (nī'trə-jən)
n.
Symbol N
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. Atomic number 7; atomic weight 14.0067; melting point -210.00°C; boiling point -195.8°C; valence 3, 5.