per·ox·ide
pə-ˈräk-ˌsīd 
: a compound (such as hydrogen peroxide) in which oxygen is visualized as joined to oxygen
peroxided; peroxiding
: to treat with a peroxide
especially
: to bleach (hair) with hydrogen peroxide
: having or being bleached hair
a peroxide blonde
Examples of peroxide in a Sentence
Recent Examples on the Web
Iman Balagam, Vogue, 13 Apr. 2025
Benzoyl peroxide is a common ingredient in over-the-counter products used to treat acne.
—Sari Hitchins, Parents, 14 Mar. 2025
Lauren Valenti, Vogue, 4 Feb. 2019
Lauren O'Connor, Ms, Health, 16 Dec. 2024
The enamel-safe kit uses an LED light and peroxide gel, similar to laser whitening treatments at a dental office.
—Kaitlin Gates, Better Homes & Gardens, 21 Nov. 2024
See All Example Sentences for peroxide
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Noun
Carbamide peroxide Type: Carbamide peroxide gel syringe, LED whitening mouthpiece
Number of Treatments Included: 20
How to Use: After brushing your teeth and charging the LED whitening light, apply a thin line of gel to the top and bottom of the tray.
—Iman Balagam, Vogue, 13 Apr. 2025
Benzoyl peroxide is a common ingredient in over-the-counter products used to treat acne.
—Sari Hitchins, Parents, 14 Mar. 2025
Verb
Freshly peroxided, Mock headed to the skatepark later that day.
—Lauren Valenti, Vogue, 4 Feb. 2019
Adjective
Quality inspections scrutinize ideal acidity levels, peroxide values, and light-based analyses.8
These standards are set by the International Olive Council (IOC) and the European Commission.
—Lauren O'Connor, Ms, Health, 16 Dec. 2024
The enamel-safe kit uses an LED light and peroxide gel, similar to laser whitening treatments at a dental office.
—Kaitlin Gates, Better Homes & Gardens, 21 Nov. 2024
See All Example Sentences for peroxide
Cite this Entry
“Peroxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/peroxide. Accessed 6 May. 2025.
Copy CitationMedical Definition
peroxide
noun
per·ox·ide
pə-ˈräk-ˌsīd
: a compound (as hydrogen peroxide) in which oxygen is visualized as joined to oxygen
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