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Definition of "nitrogen" []

  • 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. (noun)
  • A colourless odourless relatively unreactive gaseous element that forms 78 per cent (by volume) of the air, occurs in many compounds, and is an essential constituent of proteins and nucleic acids: used in the manufacture of ammonia and other chemicals and as a refrigerant. Symbol: N; atomic no: 7; atomic wt: 14.00674; valency: 3 or 5; density: 1⁄2506 kg/m3; melting pt: –210.00°C; boiling pt: –195.8°C (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

  • (as modifier) (noun)

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Use "nitrogen" in a sentence
  • "From a Chemical & Engineering News account at the time: "While some depictions are chemically accurate -- such as nitrogen, which shows a rooted elephant drawing nitrogen from the soil -- others are more a play on the names -- for example, the masked Lone Ranger atop a rearing white elephant representing silver.""
  • "Instead of "vilifying agriculture," it seems the filmmakers worked hard to focus on farmer-based solutions-like those of brothers Dick and Jack Gerhardt, who created a tool that assesses how much nitrogen is needed in a given field by reading chlorophyll levels."
  • "My other thought — could the ground there be too high in nitrogen?"