benzoyl peroxide

noun

: a colorless to white crystalline compound C₁₄H₁₀O₄ that is used as a bleaching agent (as for whitening flour), as a catalyst for the synthesis of polymers (such as polystyrene), and medically as an antibacterial and keratolytic agent especially for the topical treatment of acne

Examples of benzoyl peroxide in a Sentence

Recent Examples on the Web

Some providers also recommend adding benzoyl peroxide to your treatment to further eliminate bacteria. —Sarah Bradley, Health, 6 Feb. 2025

Cetaphil's Gentle Clear Complexion-Clearing BPO Acne Cleanser is a benzoyl peroxide–loaded Best of Beauty winner that pairs well with this serum. —Sarah Han, Allure, 29 Jan. 2025

Try benzoyl peroxide to address blemish-prone skin. Dry Skin For dry skin: Look for gentle, hydrating cleansers that don't strip your skin of moisture. —Anna Giorgi, Verywell Health, 22 Jan. 2025

It's formulated with benzoyl peroxide and boasts antimicrobial properties that clear zits and prevent future breakouts. —Kiana Murden, Vogue, 19 Dec. 2024

Word History

First Known Use

1867, in the meaning defined above

Rhymes for benzoyl peroxide

• acetaldehyde
• acetanilide
• arabinoside
• cycloheximide
• cyclophosphamide
• diethylamide
• dinucleotide
• ferricyanide
• ferrocyanide
• glutaraldehyde
• glyceraldehyde
• hydroperoxide

Kids Definition

benzoyl peroxide

noun

ben·​zo·​yl peroxide

ˈben-zə-ˌwil-,

-ˌzȯil-

: a white crystalline compound used in bleaching and in medicine especially in the treatment of acne

Medical Definition

benzoyl peroxide

noun

: a white crystalline flammable compound C₁₄H₁₀O₄ used in bleaching and in medicine especially in the treatment of acne

Note: Benzoyl peroxide is marketed the trademark Epiduo when used in combination with adapalene.