nitrogen

noun

ni·​tro·​gen ˈnī-trə-jən How to pronounce nitrogen (audio)
: a nonmetallic chemical element with atomic number 7 that under standard conditions is a colorless, odorless, inert gas, that constitutes 78 percent of the Earth's atmosphere, and that is used especially in the industrial synthesis of ammonia, as a component of inert atmospheres, and in liquid form as a refrigerant
often used before another noun
the nitrogen cycle
nitrogen fertilizer
see Chemical Elements Table

Examples of nitrogen in a Sentence

Recent Examples on the Web
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Other states have reauthorized the use of electric chairs, while Alabama last year started executing people using nitrogen gas. Raul A. Reyes, Newsweek, 22 Jan. 2025 As wind blew air through a mesh coated with catalysts to extract nitrogen and hydrogen from water vapor, the device produced enough ammonia with a sufficiently high concentration for use as a hydroponic fertilizer – all without the need for additional electricity or radiation. New Atlas, 16 Dec. 2024 And after cicadas die and their bodies decay, nitrogen and other nutrients are added to the soil. Saleen Martin, USA TODAY, 14 Jan. 2025 Blue and purple lights are produced by nitrogen molecules, often at lower altitudes. Yaakov Katz, Newsweek, 13 Jan. 2025 See all Example Sentences for nitrogen 

Word History

Etymology

French nitrogène, from nitre niter + -gène -gen

First Known Use

1791, in the meaning defined above

Time Traveler
The first known use of nitrogen was in 1791

Dictionary Entries Near nitrogen

Cite this Entry

“Nitrogen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nitrogen. Accessed 30 Jan. 2025.

Kids Definition

nitrogen

noun
ni·​tro·​gen ˈnī-trə-jən How to pronounce nitrogen (audio)
: a colorless tasteless odorless element that occurs as a gas which makes up 78 percent of the atmosphere and that forms a part of all living tissues see element
nitrogenous adjective

Medical Definition

nitrogen

noun
ni·​tro·​gen ˈnī-trə-jən How to pronounce nitrogen (audio)
: a common nonmetallic element that in the free form is normally a colorless 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 (as proteins, 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 Chemical Elements Table

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