peroxide
noun
[ pəˈrɒksʌɪd ]
• a 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"
peroxide
verb
• bleach (hair) with peroxide.
• "she peroxided her wavy brown hair"
Origin:
early 19th century: from per- (sense 2) + oxide.