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⁻.

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

verb

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

    • ‘His delicately peroxided locks also contribute to his irresistible charms.’
    • ‘He was immediately recognisable for his peroxided hair.’
    • ‘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.’
    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

/pəˈräkˌsīd//pəˈrɑkˌsaɪd/