hydrogen peroxide


Definition of hydrogen peroxide

: an unstable compound H2O2 used especially as an oxidizing and bleaching agent, an antiseptic, and a propellant

Examples of hydrogen peroxide in a Sentence

Recent Examples on the Web

There's hydrogen peroxide, carbamide peroxide, there's different kinds. Kristen Jordan Shamus, Detroit Free Press, "Charcoal toothpaste can remove more than stains from your teeth, dentist warns," 24 June 2019 In the late 1800s, it was discovered that hydrogen peroxide could be used as a bleaching agent, paving the way for women (and a few men) to enter the world of commercial hair color. Longreads, "True Roots," 5 June 2019 Normally, catalase is one of the most efficient enzymes in the human body, capable of decomposing of millions of hydrogen peroxide molecules every second. David Grossman, Popular Mechanics, "Micro-Submarines Could Deliver Medicine in the Body Without Surgery," 28 May 2019 The hydrogen peroxide acts like an all-fabric bleach to whiten the canvas fabric and the baking soda helps scrub away scuffs and stains. Carolyn Forte, Good Housekeeping, "How to Clean White Vans so They Look Brand New," 17 May 2019 Common ingredients include stain removers (such as sodium tripolyphosphateor hexametaphosphate and hydrated silica) and bleach, often listed as calcium peroxide or hydrogen peroxide. Joanne Chen, Redbook, "Teeth: An Owner's Manual," 24 July 2017 Evan acted quickly, called the vet, and — at the vet’s direction — gave Milo a dose of hydrogen peroxide to induce vomiting. Stephanie Eckelkamp, Good Housekeeping, "Why You Should Never Let Your Dog Eat a Corn Cob," 20 July 2018 Take a clean eyedropper filled with baby oil, mineral oil, glycerin, or hydrogen peroxide, and put a few drops into your ear canal. Korin Miller, SELF, "What to Do If You Have an Earwax Blockage," 29 Jan. 2019 Start by applying hydrogen peroxide or witch hazel to the affected area. Carolyn Twersky, Seventeen, "The Correct Way to Pop a Pimple," 21 Dec. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hydrogen peroxide.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of hydrogen peroxide

1872, in the meaning defined above

Keep scrolling for more

Learn More about hydrogen peroxide

Statistics for hydrogen peroxide

Last Updated

28 Jun 2019

Look-up Popularity

Time Traveler for hydrogen peroxide

The first known use of hydrogen peroxide was in 1872

See more words from the same year

Keep scrolling for more

More Definitions for hydrogen peroxide

hydrogen peroxide


English Language Learners Definition of hydrogen peroxide

: a liquid that is used to make things lighter in color or to kill bacteria

hydrogen peroxide


Kids Definition of hydrogen peroxide

: a liquid chemical containing hydrogen and oxygen and used for bleaching and as an antiseptic

hydrogen peroxide


Medical Definition of hydrogen peroxide

: an unstable compound H2O2 used especially as an oxidizing and bleaching agent and as an antiseptic

Keep scrolling for more

More from Merriam-Webster on hydrogen peroxide

Spanish Central: Translation of hydrogen peroxide

Nglish: Translation of hydrogen peroxide for Spanish Speakers

Britannica.com: Encyclopedia article about hydrogen peroxide

Comments on hydrogen peroxide

What made you want to look up hydrogen peroxide? Please tell us where you read or heard it (including the quote, if possible).


a small bunch of flowers

Get Word of the Day daily email!

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
True or False

Test your knowledge - and maybe learn something along the way.

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!