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

Try to keep both dry between uses, disinfect the brush head weekly (soaking it in hydrogen peroxide or antibacterial mouthwash will do the trick), and replace your toothbrush every three to four months. —Mary Cornetta, Better Homes & Gardens, 9 Sep. 2024

Advertisement Once inside, prosecutors allege Love beat the boy with the wood and poured hydrogen peroxide on the wounds. —Hannah Fry, Los Angeles Times, 5 Sep. 2024

Prosecutors allege in the statement that Love beat the boy with the lumber and then poured hydrogen peroxide on his wounds. —Sean Neumann, Peoplemag, 5 Sep. 2024

Avoid harsh chemicals around the area like hydrogen peroxide, alcohol, soaps, essential oils, or ointments. —Annie Blay, Allure, 10 July 2024

Word History

First Known Use

1872, in the meaning defined above

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