Definition of peroxide in English:


Line breaks: per|ox¦ide
Pronunciation: /pəˈrɒksʌɪd


  • 1A compound containing two oxygen atoms bonded together in its molecule or as the anion O22−: the peptide neutralizes free radicals and peroxides, both of which can prevent cells from operating properly benzoyl peroxide sodium peroxide
    More example sentences
    • Functions include detoxification of free radicals and peroxides, regulation of cell growth and protein function, and maintenance of immune function.
    • The increased accumulation of lipid peroxides is indicative of enhanced production of toxic oxygen species.
    • Similar to peroxides, decomposition of disulfides results in the formation of sulfur-centered radicals.
  • 1.1 [mass noun] Hydrogen peroxide, especially as used as a bleach for the hair: [as modifier]: a peroxide blonde
    More example sentences
    • Make poultice soaked with 20% peroxide (hair bleaching strength) and a few drops of ammonia.
    • ‘I think it's important to be original,’ the 27-year-old with peroxide blonde hair said.
    • A woman steps out, quite tall with peroxide blonde hair, looks English.


[with object] Back to top  
  • Bleach (hair) with peroxide: she peroxided her wavy brown hair (as adjective peroxided) a face framed in peroxided curls
    More example sentences
    • I am not convinced by her argument that peroxided hair came into vogue in the early 1920s, nor that the national fascination with blondes was strong in that decade.
    • My agent filled them in that my hair had been peroxided and was very weak.
    • It took half an hour before a certain table of heavily peroxided girls understood what an essence was.


early 19th century: from per- ( sense 2) + oxide.

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Word of the day skosh
Pronunciation: skəʊʃ
a small amount; a little