Definition of dioxide
: an oxide (such as carbon dioxide) containing two atoms of oxygen in the molecule
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Recent Examples of dioxide from the Web
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That has since evolved into an active fissure, spewing lava 100 feet into the air, and emitting harmful levels of sulphur dioxide gas.
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That gas will have to be flared, or oil drilling and production will need to decrease, a choice between increasing climate-warming carbon-dioxide emissions or decreasing profits.
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That’s where the nuclear fission reaction takes place, powered by fuel composed of uranium dioxide baked into ceramic pellets.
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Garner perfected an air-filtration system on a mask designed by his wife, Glenna, that used charcoal filters which absorbed sulphur dioxide and ammonia.
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These finalists will be given space near a power plant and pipes that will deliver some of the plant's carbon-dioxide-rich exhaust.
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Ships contribute about 13% of total sulfur-dioxide emissions, according to the IMO, by burning heavy fuel with a 3.5% sulfur content.
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Transportation accounts for one-third of the nation’s carbon-dioxide emissions and recently surpassed power plants as its largest contributor to global warming.
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Take into account power-plant emissions, and your electric car could easily be responsible for more than 100 grams of carbon-dioxide emissions for every mile driven.
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.
Origin and Etymology of dioxide
International Scientific Vocabulary
NEW! Time Traveler
First Known Use: circa 1847
in the meaning defined above
See Words from the same yearDIOXIDE Defined for English Language Learners
Definition of dioxide for English Language Learners
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chemistry : a molecule that has two atoms of oxygen and one atom of another element (such as carbon)
Medical Dictionary
medical Definition of dioxide
: an oxide (as carbon dioxide) containing two atoms of oxygen in a molecule
Learn More about dioxide
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See words that rhyme with dioxide Nglish: Translation of dioxide for Spanish speakers Britannica English: Translation of dioxide for Arabic speakers
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