Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “peroxide”

See all translations

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.
Translations of “peroxide”
in Chinese (Traditional) 過氧化氫,雙氧水…
in Chinese (Simplified) 过氧化氢,双氧水…
(Definition of peroxide from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of peroxide?
Add Cambridge dictionaries to your browser to your website

Definitions of “peroxide” in other dictionaries

Word of the Day

comma

the symbol , used in writing to separate parts of a sentence showing a slight pause, or to separate the single things in a list

Word of the Day

Lies, lies, lies!

by Kate Woodford,
February 25, 2015
​​​ According to sociologists (=people who study the relationships between people living in groups), we are good at lying. As a species, we have developed a remarkable ability to deceive each other (= persuade each other that something false is true). Being able to say things that are not true can help with

Read More 

snapchat verb

March 02, 2015
to send someone a message using the photomessaging application Snapchat We used to have a thing until he got a girlfriend. now

Read More