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

The spacesuit features life-support systems, redundant (backup) systems, an onboard diagnostic system, a regenerable cardon dioxide scrubbing system and cooling technology to remove heat. —Greta Cross, USA Today, 9 June 2026

Israeli military strikes on Iranian oil infrastructure have sparked days-long conflagrations, releasing a plume of noxious sulflur dioxide over an area roughly the size of Italy. —Tony Briscoe, Los Angeles Times, 4 June 2026

At the heart of the design is a material called vanadium dioxide (VO₂), a rather strange compound famous for its split personality. —New Atlas, 25 May 2026

Nitrogen Dioxide Nitrogen dioxide is a colorless, odorless gas present in appliances that burn fuel, including gas, kerosene, or wood. —Sanja Jelic, Verywell Health, 29 Apr. 2026

Word History

Etymology

International Scientific Vocabulary

First Known Use

circa 1847, in the meaning defined above

Phrases Containing dioxide

• carbon dioxide
• chlorine dioxide
• lead dioxide
• manganese dioxide
• nitrogen dioxide
• silicon dioxide
• sulfur dioxide
• titanium dioxide

Rhymes for dioxide

• abide
• allied
• applied
• aside
• astride
• azide
• backside
• bankside
• bastide
• bayside
• bedside
• belied

Kids 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