Definition of peroxide in US English:

peroxide

noun

Chemistry
  • 1A compound containing two oxygen atoms bonded together in its molecule or as the anion O₂²⁻.

    • ‘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.’
    • ‘Functions include detoxification of free radicals and peroxides, regulation of cell growth and protein function, and maintenance of immune function.’
    • ‘Similarly, concentrations of lipid peroxides, as indicators of lipid oxidation, were unchanged.’
    • ‘The process uses organic peroxides that do not rely on any accelerators.’
    1. 1.1 Hydrogen peroxide, especially as used as a bleach for the hair.
      as modifier ‘a peroxide blonde’
      • ‘‘I think it's important to be original,’ the 27-year-old with peroxide blonde hair said.’
      • ‘She went to the bathroom to grab some peroxide water.’
      • ‘Try here for ammonia and peroxide free hair dye.’
      • ‘A tall, reedy blonde girl stood in front of her, chewing on a piece of her peroxide hair.’
      • ‘She had long peroxide colored hair and amazingly light hazel eyes.’
      • ‘I followed my cousin's instructions and put a combination of peroxide, lemon juice and Sun-In through my black hair.’
      • ‘Jessica got some peroxide, some toilet paper, and a band-aid for me.’
      • ‘He had a bright purple suit on and had dyed his hair peroxide blond.’
      • ‘In over-the-counter treatments (like the strips you use), peroxide bleaches your pearly whites.’
      • ‘Jason washed his hair in the tub while Emily mixed a light solution of peroxide and water to bleach his hair.’
      • ‘Remember peroxide is bleach so test an inconspicuous spot first for color fastness.’
      • ‘Another time a girlfriend of mine introduced me to home perms, peroxide, and W - 2 solution.’
      • ‘I never shaved my head, but I definitely mixed my own packets of peroxide, and put big fat streaks of blonde in my hair.’
      • ‘I was brought up in West Bromwich, and spent my formative years dyeing my hair peroxide blonde and scowling a lot.’
      • ‘She dipped her hair in peroxide and fell asleep.’
      • ‘It turns out that all permanent dye must use PPD to adhere to the hair shaft and peroxide to open it.’
      • ‘Make poultice soaked with 20% peroxide (hair bleaching strength) and a few drops of ammonia.’
      • ‘A woman steps out, quite tall with peroxide blonde hair, looks English.’
      • ‘Hair could be bleached with peroxide or dyed only black or brown.’
      • ‘Faith yelled, ‘I mean, yeah it looks nice, but really, who dies their hair with peroxide?’’

verb

[with object]
  • Bleach (hair) with peroxide.

    • ‘His delicately peroxided locks also contribute to his irresistible charms.’
    • ‘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.’
    • ‘He was immediately recognisable for his peroxided hair.’
    • ‘It took half an hour before a certain table of heavily peroxided girls understood what an essence was.’
    • ‘My agent filled them in that my hair had been peroxided and was very weak.’
    make pale, turn pale, whiten, make pallid, turn pallid, lighten, grey, wash out, fade, blench, etiolate, decolorize, bleach
    View synonyms

Origin

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

Pronunciation

peroxide

/pəˈrɑkˌsaɪd//pəˈräkˌsīd/