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English definition of “peroxide”

peroxide

noun [C or U] uk   /pəˈrɒk.saɪd/ us    /pəˈrɑːk-/
a liquid chemical used to make hair very pale in colour or to kill bacteria: Peroxide is a bleach and an antiseptic. Peroxides are found in household detergents. She has dyed her brown hair peroxide blonde.
(Definition of peroxide from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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