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Definition of peroxide

peroxide

/pəˈrɑːk.saɪd/
per · ox · ide
Plural:peroxides
•
Adjective:peroxidic
•
Past Simple:peroxided
•
Past Participle:peroxided
•
Present Participle:peroxiding
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peroxide Lexical Profile

peroxide Game Scores & Validity

• noun

1

A colorless liquid chemical compound, specifically hydrogen peroxide, widely used in dilute aqueous solution as an antiseptic, disinfectant, and hair-bleaching agent.

Example

"The nurse dabbed a little peroxide onto the scraped knee to clean the wound."

2

Any chemical compound containing an oxygen-oxygen single bond or the peroxide ion, which typically acts as a strong oxidizing agent.

Example

"Organic peroxides must be stored in cool environments because they are highly reactive and thermally unstable."

Synonyms
View all synonyms for peroxide

• verb

1

To bleach or lighten (hair) by treating it with hydrogen peroxide.

Example

"She decided to peroxide her dark curls into a striking platinum blonde for the summer."

Synonyms
View all synonyms for peroxide
Antonyms
View all antonyms for peroxide

• Rhymes for peroxide

• Nearby Words

permutation
perniciousness
perovskia
peroxide
perp
perpendicular
perpendicularly

Word Origin & Etymology

Coined in the early 19th century by Scottish chemist Thomas Thomson from the prefix 'per-' (meaning 'thoroughly' or 'maximum') and 'oxide', denoting an oxide containing the highest proportion of oxygen.

Cite this Entry

Wordmom. (2026). Definition of Peroxide. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/peroxide
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