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

At the event, 20 experts from a variety of disciplines crowded into a room in a Fort Lauderdale hotel and tried to address the growing concern of rising carbon-dioxide levels in the atmosphere. — Bilge Ebiri, Vulture, 6 Oct. 2026

Film strains sapphire For the study, the researchers examined vanadium dioxide (VO2) films, which are grown on sapphire. — Georgina Jedikovska, Interesting Engineering, 2 Oct. 2026

During the first episode, carbon-dioxide-rich groundwater reacted with olivine, a mineral that formed as magma slowly cooled. — Samantha Mathewson, Space.com, 24 Sep. 2026

Rita Esuru Okoroafor, an energy resources engineer at Texas A&M University, is studying the effects of various stimulation approaches, including fracturing, catalysts, and carbon-dioxide injection, on hydrogen generation. — IEEE Spectrum, 11 Aug. 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