dioxide
noun
di·ox·ide
(ˌ)dī-ˈäk-ˌsīd 
: 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
Sulfur dioxide was predominantly a product of power plants; automobiles were the biggest culprit in nitrogen oxide emissions.
—
Rachel Rothschild, Foreign Affairs, 24 Aug. 2015
Sulfur dioxide is a key aerosol emitted from burning fossil fuels.
—Lee Habeeb, MSNBC Newsweek, 3 Apr. 2025
Sulfur dioxide, nitrogen oxides, methane, and nitrous oxide emissions could also be reduced.
—Addy Bink, The Hill, 6 Jan. 2025
Sources of Silicon Dioxide Silicon dioxide is found in soil and several foods.
—Merve Ceylan, Health, 2 Nov. 2024
See All Example Sentences for dioxide
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.
Rachel Rothschild, Foreign Affairs, 24 Aug. 2015
Sulfur dioxide is a key aerosol emitted from burning fossil fuels.
—Lee Habeeb, MSNBC Newsweek, 3 Apr. 2025
Sulfur dioxide, nitrogen oxides, methane, and nitrous oxide emissions could also be reduced.
—Addy Bink, The Hill, 6 Jan. 2025
Sources of Silicon Dioxide Silicon dioxide is found in soil and several foods.
—Merve Ceylan, Health, 2 Nov. 2024
See All Example Sentences for dioxide
Cite this Entry
“Dioxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dioxide. Accessed 24 Jun. 2025.
Copy CitationKids Definition
dioxide
noun
di·ox·ide
(ˈ)dī-ˈäk-ˌsīd
: an oxide containing two atoms of oxygen in the molecule
Medical Definition
dioxide
noun
di·ox·ide
(ˈ)dī-ˈäk-ˌsīd
: an oxide (as carbon dioxide) containing two atoms of oxygen in a molecule
Love words? Need even more definitions?
Merriam-Webster unabridged
Share