hydrogen peroxide

noun

: an unstable compound H₂O₂ used especially as an oxidizing and bleaching agent, an antiseptic, and a propellant

Examples of hydrogen peroxide in a Sentence

Recent Examples on the Web

The Sirius engines use hybrid propulsion, with a solid fuel and hydrogen peroxide as an oxidizer, while Phoenix burns a mixture of kerosene and cryogenic liquid oxygen. —Stephen Clark, ArsTechnica, 30 July 2025

Reach for hydrogen peroxide to make cleaning easier. —Lauren David, Southern Living, 13 June 2025

Consuming industrial-strength hydrogen peroxide solutions at 10% can lead to systemic toxicity and fatalities.10 Eye pain and irritation: Eye exposure to 3% hydrogen peroxide may result in pain and irritation, but severe injury is rare. —Anna Giorgi, Verywell Health, 12 May 2025

Unless recommended by your healthcare provider, avoid strong ingredients like hydrogen peroxide or rubbing alcohol, as these can inflame and irritate the skin further. —Lisa Desantis, Glamour, 30 July 2025

Word History

First Known Use

1872, in the meaning defined above

Rhymes for hydrogen peroxide

• aminoglycoside
• chlordiazepoxide
• dimethylformamide
• oligosaccharide
• paraformaldehyde
• polynucleotide
• ribonucleotide
• abide
• allied
• applied
• aside
• astride

Kids Definition

hydrogen peroxide

noun

: an unstable liquid compound containing hydrogen and oxygen and used especially for bleaching and as an antiseptic

Medical Definition

hydrogen peroxide

noun

: an unstable compound H₂O₂ used especially as an oxidizing and bleaching agent and as an antiseptic