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
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/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
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.
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