Phrase guide

hydrogen peroxide

noun · 2 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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1

noun

Meaning 1

A colourless liquid, H2O2, soluble in water, used as a mild antiseptic, bleaching agent (especially for bleaching hair), oxidizing agent and chemical reagent.

Definition source: English Wiktionary via Wiktextract

Usage: 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

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: peroxide

Antonyms: none provided

Broader terms: oxidant, oxidizer, oxidiser, oxidizing agent

History

Etymology

No etymology was provided for this word.

Across languages

Translations

54 source translations are retained for this English entry.

  • Belarusian: надтленак водніку (nadtlenak vodniku) — H2O2
  • Bulgarian: кислоро́дна вода́ (kisloródna vodá) — H2O2
  • Catalan: peròxid d'hidrogen — H2O2
  • Catalan: aigua oxigenada — H2O2
  • Cebuano: agwa oksinada — H2O2
  • Chinese Cantonese: 過氧化氫 /过氧化氢 (gwo3 joeng5 faa3 hing1) — H2O2
  • Chinese Mandarin: 過氧化氫 /过氧化氢 (guòyǎnghuàqīng) — H2O2
  • Czech: peroxid vodíku — H2O2
  • Danish: brintoverilte — H2O2
  • Dutch: waterstofperoxide — H2O2
  • Dutch: zuurstofwater — H2O2
  • Esperanto: oksigena akvo — H2O2
  • Esperanto: hidrogena peroksido — H2O2
  • Faroese: vetnisovursúrni — H2O2
  • Finnish: vetyperoksidi — H2O2
  • French: peroxyde d'hydrogène — H2O2
  • French: eau oxygénée — H2O2
  • German: Wasserstoffperoxid — H2O2
  • Hebrew: מֵי חַמְצָן (mé khamtsán) — H2O2
  • Hindi: उदजन परूजारक (udjan parūjārak) — H2O2
  • Hungarian: hidrogén-peroxid — H2O2
  • Italian: acqua ossigenata — H2O2
  • Italian: perossido di idrogeno — H2O2
  • Japanese: 過酸化水素 (kasankasuiso) — H2O2
  • Khmer: អ៊ីដ្រូសែនពែអុកស៊ីត (ʼiidrousaenpɛɛʼoksiit) — H2O2
  • Khmer: ទឹកអុកស៊ីសែន (tɨkʼoksiisaen) — H2O2
  • Korean: 과산화수소 (gwasanhwasuso) — H2O2
  • Korean: 이산화수소 (isanhwasuso) — H2O2
  • Macedonian: водород пероксид (vodorod peroksid) — H2O2
  • Malay: hidrogen peroksida — H2O2
  • Norwegian: hydrogenperoksid — H2O2
  • Persian: آب اکسیژنه (âb oksižene) — H2O2
  • Persian: هیدروژن پراکسید (hidrožen perâksid) — H2O2
  • Polish: nadtlenek wodoru — H2O2
  • Polish: woda utleniona — H2O2
  • Polish: perhydrol — H2O2
  • Portuguese: peróxido de hidrogênio — H2O2
  • Portuguese: peróxido de hidrogénio — H2O2
  • Portuguese: água oxigenada — H2O2
  • Romanian: apă oxigenată — H2O2
  • Russian: пе́рекись водоро́да (pérekisʹ vodoróda) — H2O2
  • Slovak: peroxid vodíka — H2O2
  • Slovene: vodikov peroksid — H2O2
  • Spanish: peróxido de hidrógeno — H2O2
  • Spanish: agua oxigenada — H2O2
  • Swedish: väteperoxid — H2O2
  • Tagalog: agwa-oksihenada — H2O2
  • Thai: ไฮโดรเจนเพอร์ออกไซด์ (hai-droh-jayn per ók-sai) — H2O2
  • Tok Pisin: proksait — H2O2
  • Turkish: hidrojen peroksit — H2O2
  • Ukrainian: пере́кис во́дню (perékys vódnju) — H2O2
  • Ukrainian: пероксид водню (peroksyd vodnju) — H2O2
  • Vietnamese: hydro peroxide — H2O2
  • Vietnamese: nước oxy già — H2O2