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 team discovered that in October 2018, hospital staff began draining the water tanks every day and stopped the daily monitoring of hydrogen peroxide concentration and disinfection of the water circuits every 14 days as recommended by the manufacturer. —Judy L. Thomas, Kansas City Star, 10 Mar. 2026

It is often synthesized from acetone and hydrogen peroxide, appearing as a white crystalline powder. —Lucia I Suarez Sang, CBS News, 8 Mar. 2026

The National Audubon Society recommends cleaning with hot water, a weak vinegar-and-water solution, or a hydrogen peroxide-and-water solution, rather than dish soap, due to the potential for harmful residue. —Jordan Green, Memphis Commercial Appeal, 6 Mar. 2026

Submerge beauty and hygiene tools in hydrogen peroxide to disinfect them. —Nishaa Sharma, The Spruce, 5 Mar. 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