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

When a disinfectant is necessary, Hunt and other experts say products with citric acid, hydrogen peroxide and ethyl alcohol, such as alcohol wipes, are safer alternatives. — Sandee Lamotte, CNN Money, 7 Aug. 2026

Just prior to deploying the cyborg roach, the team injected a bit of diluted hydrogen peroxide into the tank and sealed it to prevent leakage. — ArsTechnica, 3 Aug. 2026

To sanitize the dishes, spray with hydrogen peroxide and wait 10 minutes before rinsing. — Mary Marlowe Leverette, The Spruce, 2 Aug. 2026

As crews applied hydrogen peroxide to fight the algae blooms, the pool’s liner began to peel and bubble. — Antonio Pequeño Iv, Forbes.com, 1 Aug. 2026

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