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

To get there, warming must peak around 1.8C by 2050 and vast amounts of carbon dioxide would have to be removed from the atmosphere to bring temperatures down further.

From Barron's ● Oct. 21, 2026

In a healthy state they absorb vast quantities of planet-warming carbon dioxide, helping to keep the Earth cool.

From BBC ● Oct. 17, 2026

Carbon dioxide and water meet in the chloroplasts, where solar energy breaks down their molecules and reassembles them into the sugar glucose plus “a side order of oxygen,” the author writes.

From The Wall Street Journal ● Oct. 16, 2026

According to estimates by the think tank Carbon Majors cited in the lawsuit, Shell holds responsibility for 2.02 percent of global carbon dioxide emissions from fossil fuel and cement-making.

From Barron's ● Oct. 15, 2026

As the chick breathed, the oxygen inside the egg was replaced by the chick’s carbon dioxide.

From "Frightful's Mountain" by Jean Craighead George

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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