Englishhydrogen peroxidenounMeaningA colourless liquid, H2O2, soluble in water, used as a mild antiseptic, bleaching agent (especially for bleaching hair), oxidizing agent and chemical reagent.Related wordsperoxide(English)hydrogen dioxide(English)hydroperoxy(English)hydroperoxyl(English)hydroxyperoxide(English)hydrogen oxide(English)hydroperoxide(English)perhydroxide(English)SourcesDictionaryAPI.dev English dictionary data