dioxide

noun

di·​ox·​ide (ˌ)dī-ˈäk-ˌsīd How to pronounce dioxide (audio)
: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Rita Esuru Okoroafor, an energy resources engineer at Texas A&M University, is studying the effects of various stimulation approaches, including fracturing, catalysts, and carbon-dioxide injection, on hydrogen generation. — IEEE Spectrum, 11 Aug. 2026 For years, ruthenium dioxide (RuO₂) has kept physicists confused. — Rupendra Brahambhatt, Interesting Engineering, 2 Aug. 2026 Temperature and carbon-dioxide levels are controlled within the equipment enclosure. — Sabbir Rangwala, Forbes.com, 29 June 2026 Microsoft has invested primarily in renewable energy to offset carbon-dioxide emissions from its data centers. — Spencer Kimball, CNBC, 22 June 2026 See All Example Sentences for dioxide

Word History

Etymology

International Scientific Vocabulary

First Known Use

circa 1847, in the meaning defined above

Time Traveler
The first known use of dioxide was circa 1847

Phrases Containing dioxide

Rhymes for dioxide

See All Rhymes for dioxide

Browse Nearby Words

dioxane
dioxide
dioxin
See all Nearby Words

Cite this Entry

“Dioxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dioxide. Accessed 1 Sep. 2026.

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Kids Definition

dioxide

noun
di·​ox·​ide (ˈ)dī-ˈäk-ˌsīd How to pronounce dioxide (audio)
: an oxide containing two atoms of oxygen in the molecule

Medical Definition

dioxide

noun
di·​ox·​ide (ˈ)dī-ˈäk-ˌsīd How to pronounce dioxide (audio)
: an oxide (as carbon dioxide) containing two atoms of oxygen in a molecule
Last Updated: - Updated example sentences
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