dioxide

American  

[dahy-ok-sahyd, -sid] / daɪˈɒk saɪd, -sɪd /

noun

Chemistry.

• dioxides
  plural

1. an oxide containing two atoms of oxygen, each of which is bonded directly to an atom of a second element, as manganese dioxide, MnO 2 , or nitrogen dioxide, NO 2 .

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dioxide British  

/ daɪˈɒksaɪd /

noun

1. any oxide containing two oxygen atoms per molecule, both of which are bonded to an atom of another element

2. another name for a peroxide

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dioxide Scientific  

/ dī-ŏk′sīd /

1. A compound containing two oxygen atoms per molecule.

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Other Word Forms

Noun Inflected Forms

• dioxides
  plural

Etymology

Origin of dioxide

First recorded in 1840–50; di- ¹ + oxide

Example Sentences

See Examples For:

dioxide dioxides

Mr. Thomas concludes that because cutting carbon dioxide yields some benefits, development institutions like the World Bank must make it a priority.

From The Wall Street Journal ● Sep. 17, 2026

Methane typically remains in the atmosphere for about 10 years before chemical reactions remove it, while a portion of carbon dioxide can influence the climate for far longer.

From Science Daily ● Sep. 15, 2026

EPA officials said on a call Monday that the change will not include pollutants that directly harm health such as carbon monoxide and nitrogen dioxide, which are regulated separately.

From Los Angeles Times ● Sep. 14, 2026

The US is currently the second-biggest emitter of planet-warming greenhouse gases, such as carbon dioxide, behind China.

From BBC ● Sep. 14, 2026

Also, my breathing turned some oxygen into carbon dioxide, which was captured by the suit's C02 filters.

From "The Martian" by Andy Weir

The blue flames also emit harmful pollutants like nitrogen dioxides, as well as planet-warming gases.

From New York Times ● May 30, 2023

The burning of trash releases a host of pollutants, such as nitrogen oxides, sulfur dioxides and particulate matter, which are tiny fragments of debris that, once inhaled, cause an array of health problems.

From The Guardian ● Feb. 21, 2019

That said, I do love the dried fruit because it’s made without the sulfates and the sulfur dioxides and preservatives and is totally delicious.

From Slate ● Feb. 5, 2018

These oxides are distinguished from one another by such names as "higher" and "lower oxides," "peroxides," "protoxides," "dioxides," &c.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Cornelius Beringer

Most metals are deposited as such upon the cathode; a few, notably lead and manganese, separate in the form of dioxides upon the anode.

From An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes by Henry P. Talbot