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

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Etymology

Origin of dioxide

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

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Example Sentences

See Examples For:

dioxide dioxides

He also keeps things like chlorine dioxide tablets, which are often used to make water from streams or rivers safe to drink.

From BBC ● Oct. 31, 2026

These periods reveal how carbon dioxide moves between the atmosphere and oceans, and how changes in that balance can influence global temperatures.

From Science Daily ● Oct. 28, 2026

For decades, much of the research into ice age climate changes has concentrated on the Southern Ocean because of its important role in controlling atmospheric carbon dioxide.

From Science Daily ● Oct. 28, 2026

Methane, the main component of natural gas, is the second-largest cause of global warming behind carbon dioxide -- responsible for about a third, or 0.5C, of total planetary heating since the pre-industrial era.

From Barron's ● Oct. 27, 2026

White deposits, including those around Prometheus, may be frozen sulfur dioxide.

From "Cosmos" by Carl Sagan

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

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

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

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