nitrogen oxide


Definition of nitrogen oxide

: any of several oxides of nitrogen most of which are produced in combustion and are considered to be atmospheric pollutants: such as

Examples of nitrogen oxide in a Sentence

Recent Examples on the Web By 2023, the coal plant alone will contribute nearly 10 percent of the total annual nitrogen oxide emissions in the San Antonio area, according to the Alamo Area Council of Governments. Diego Mendoza-moyers,, "CPS Energy’s rates differ for residential, business customers — and therein lies a debate," 2 Nov. 2020 Such upgrades would have cut nitrogen oxide emissions, a leading cause of haze, by 75% according to the National Parks Conservation Association, or NPCA. Brian Maffly, The Salt Lake Tribune, "EPA guts plan that would have slashed pollution from Utah coal plants," 29 Oct. 2020 Environmental advocates have fought for years to shut down the towering smokestack next to Interstate 95, which has produced pollutants such as nitrogen oxide, lead and mercury. Christina Tkacik,, "5 a.m. at the mayor’s house: Activists sound the alarm on plans to renew Wheelabrator contract," 10 Oct. 2020 But in normal use, the engines emitted far more pollution, including up to 40 times more nitrogen oxide, which contributes to asthma, bronchitis, and emphysema. Geoff Colvin, Fortune, "5 years in, damages from the VW emissions cheating scandal are still rolling in," 6 Oct. 2020 Many spent years fighting to close the plant which, with its smokestack next to Interstate 95, has produced pollutants such as nitrogen oxide, lead and mercury for decades. Talia Richman,, "Baltimore City Council bill seeks to block any Wheelabrator trash incinerator contract renewal," 21 Sep. 2020 Deviating from that ratio can quickly render an engine’s catalytic converter—an aftertreatment system designed to convert harmful gases like nitrogen oxide into more benign substances—ineffective. Daniel Oberhaus, Wired, "Is Lightning-Fast Plasma the Key to a Cleaner Car Engine?," 9 Sep. 2020 According to information on the web site, at 9 a.m. Wednesday, MAML #1 measured 2.27 parts per million of methane, 144.2 parts per billion of nitric oxide, 40.1 ppb of nitrogen dioxide, and 184.8 ppb of nitrogen oxide, a precursor of ozone. Mark Schleifstein,, "Louisiana moves two mobile air monitoring labs to Lake Charles," 3 Sep. 2020 The first rule overhauls emissions limits on nitrogen oxide from heavy-duty trucks, setting much stricter requirements beginning in 2024. Josh Siegel, Washington Examiner, "Daily on Energy: California is Trump’s new campaign argument against Biden’s climate plans," 28 Aug. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'nitrogen oxide.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of nitrogen oxide

1868, in the meaning defined above

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The first known use of nitrogen oxide was in 1868

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Cite this Entry

“Nitrogen oxide.” Dictionary, Merriam-Webster, Accessed 17 Jan. 2021.

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