Standard Lemma guide

peroxide

noun · verb · 7 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /pəˈrɒksʌɪd/
  • US: Recorded audio is listed in the source snapshot.
  • UK: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: P ER0 AA1 K S AY2 D Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

A divalent radical or anion containing two oxygen atoms linked by a covalent bond; any substance containing this group yields hydrogen peroxide when treated with an acid.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: chemistry, inorganic-chemistry, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Hydrogen peroxide, especially when in an aqueous solution used as a bleach.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

Any compound containing the functional group R-O-O-R'.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: chemistry, natural-sciences, organic-chemistry, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

verb

Meaning 4

To treat (something) with hydrogen peroxide, especially hair in order to bleach it.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

a viscous liquid with strong oxidizing properties; a powerful bleaching agent; also used (in aqueous solutions) as a mild disinfectant and (in strong concentrations) as an oxidant in rocket fuels

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: hydrogen peroxide

Antonyms: none provided

Broader terms: oxidant, oxidizer, oxidiser, oxidizing agent

6

noun

Meaning 6

an inorganic compound containing the divalent ion -O-O-

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: oxide

Narrower terms: benzoyl peroxide

7

verb

Meaning 7

bleach with peroxide

Definition source: Princeton WordNet 3.0

Examples

  • She must peroxide her hair-it looks unnaturally blond

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: bleach

History

Etymology

Etymology tree Proto-Indo-European *per- Proto-Italic *per Latin perbor. Proto-Indo-European *per-der. Proto-Italic *peri- Latin per-bor. English per- Proto-Indo-European *h2eḱ-der.? Ancient Greek ὀξύς (oxús) Proto-Indo-European *ǵenh1- Proto-Indo-European *-os Proto-Indo-European *ǵénh1os Proto-Hellenic *génos Ancient Greek γένος (génos) French oxygène Proto-Indo-European *h2eḱ- Proto-Indo-European *-éh1ti Proto-Indo-European *-yeti Proto-Indo-European *-éh1yeti Proto-Indo-European *h2eḱéh1yeti Proto-Italic *akēō Latin aceō Proto-Indo-European *dheh1-der. Proto-Italic *-iðos Latin -idus Latin acidusbor. French acide blend French oxidebor. English oxide English peroxide From per- + oxide.

Across languages

Translations

26 source translations are retained for this English entry.

  • Belarusian: надтленак (nadtlenak) — chemical compound with two oxygen atoms
  • Bulgarian: пероксид (peroksid) — chemical compound with two oxygen atoms
  • Bulgarian: прекис (prekis) — chemical compound with two oxygen atoms
  • Catalan: peròxid — chemical compound with two oxygen atoms
  • Chinese Mandarin: 過氧化物 /过氧化物 (guòyǎnghuàwù) — chemical compound with two oxygen atoms
  • Czech: peroxid — chemical compound with two oxygen atoms
  • Dutch: peroxide — chemical compound with two oxygen atoms
  • Finnish: peroksidi — chemical compound with two oxygen atoms
  • French: peroxyde — chemical compound with two oxygen atoms
  • Georgian: ზეჟანგი (zežangi) — chemical compound with two oxygen atoms
  • Georgian: პეროქსიდი (ṗeroksidi) — chemical compound with two oxygen atoms
  • German: Peroxid — chemical compound with two oxygen atoms
  • Hungarian: peroxid — chemical compound with two oxygen atoms
  • Icelandic: peroxíð — chemical compound with two oxygen atoms
  • Indonesian: peroksida — chemical compound with two oxygen atoms
  • Italian: perossido — chemical compound with two oxygen atoms
  • Japanese: 過酸化物 (kasankabutsu) — chemical compound with two oxygen atoms
  • Kazakh: асқын тотық (asqyn totyq) — chemical compound with two oxygen atoms
  • Khmer: ពែអុកស៊ីត (pɛɛʼoksiit) — chemical compound with two oxygen atoms
  • Māori: waikuratei — chemical compound with two oxygen atoms
  • Polish: nadtlenek — chemical compound with two oxygen atoms
  • Portuguese: peróxido — chemical compound with two oxygen atoms
  • Romanian: peroxid — chemical compound with two oxygen atoms
  • Russian: пе́рекись (pérekisʹ) — chemical compound with two oxygen atoms
  • Russian: перокси́д (peroksíd) — chemical compound with two oxygen atoms
  • Spanish: peróxido — chemical compound with two oxygen atoms
Real reading context

peroxide in complete knowledge articles