nitrogen
noun
ni·tro·gen
ˈnī-trə-jən
: 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
Cite this Entry
“Nitrogen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nitrogen. Accessed 20 Oct. 2026.
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