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

Remove Stains with Hydrogen Peroxide To remove stains from a cutting board, soak a paper towel in hydrogen peroxide and lay it on top of the board. —Jolie Kerr, Better Homes & Gardens, 24 Mar. 2025

The greater the amount of hydrogen peroxide that is present in that liquid, the greater the number of electrons produced, and thus the stronger the measured electrical signal. —Ben Coxworth, New Atlas, 22 Mar. 2025

In several experiments, the wearable accurately identified the presence of hydrogen peroxide in groups of plants exposed to a pathogen. —Mack Degeurin, Popular Science, 19 Mar. 2025

This particular kit from Crest grants a professional-level treatment from the comforts of home, by way of hydrogen peroxide that’s powerful but also enamel-friendly. —Stacia Datskovska, WWD, 18 Mar. 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