di·​ox·​ide | \(ˌ)dī-ˈäk-ˌsīd \

Definition of dioxide 

: an oxide (such as carbon dioxide) containing two atoms of oxygen in the molecule

Examples of dioxide in a Sentence

Recent Examples on the Web

But the carbon-dioxide market does not work like that, explains Adam Collins of Liberum, another bank. The Economist, "Shortages of carbon dioxide in Europe may get worse," 5 July 2018 There the calcium carbonate is heated to 900°C to release pure carbon-dioxide gas ready for capture, and calcium oxide. The Economist, "Extracting carbon dioxide from the air is possible. But at what cost?," 7 June 2018 Scientists say toxic sulphur dioxide emissions have more than doubled since the eruptions began. CBS News, "Man says lava bomb from Hawaii volcano "snapped" his leg in half," 23 May 2018 Professor Cheung said that the carbon-dioxide concentration in air was generally no more than about 0.2 percent, and that a concentration of more than about 5 percent would cause a person to feel breathless. New York Times, "8 Saved, 5 to Go in Thai Cave Rescue," 9 July 2018 In 2016 global carbon-dioxide sales were worth just over $2bn—minuscule amounts compared with $49bn-worth of ammonia sales. The Economist, "Shortages of carbon dioxide in Europe may get worse," 5 July 2018 Some governments, mindful of climate change and carbon-dioxide emissions, are taking steps to boost demand. Philly.com, "How batteries went from primitive power to global domination," 16 June 2018 In the aftermath of the Oct. 22 incident, one flare operated for 14 hours and a second operated for 41 hours, and the company estimated that nearly 33 tons of sulphur dioxide and 320 pounds of hydrogen sulfide were released to the atmosphere. Mark Schleifstein, NOLA.com, "Dramatic Chalmette Refinery flaring was result of accident, not routine, state says," 12 Mar. 2018 Despite carbon-dioxide suppression and water-misting equipment, the fire spread to a garage area, where cars burned and explosions thundered. Bart Jansen, USA TODAY, "NTSB: Puerto Rico ship fire revealed maintenance problems, poor crew training," 5 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'dioxide.' 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 dioxide

circa 1847, in the meaning defined above

History and Etymology for dioxide

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Statistics for dioxide

Last Updated

30 Sep 2018

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Time Traveler for dioxide

The first known use of dioxide was circa 1847

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English Language Learners Definition of dioxide

chemistry : a molecule that has two atoms of oxygen and one atom of another element (such as carbon)


di·​ox·​ide | \(ˈ)dī-ˈäk-ˌsīd \

Medical Definition of dioxide 

: an oxide (as carbon dioxide) containing two atoms of oxygen in a molecule

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Comments on dioxide

What made you want to look up dioxide? Please tell us where you read or heard it (including the quote, if possible).


to clear from alleged fault or guilt

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