ox·i·diz·er | \ˈäk-sə-ˌdī-zər \

Definition of oxidizer 

: oxidizing agent especially : one used to support the combustion of a rocket propellant

Examples of oxidizer in a Sentence

Recent Examples on the Web

The additional nitrogen adds density to the molecule, and removing carbon helps balance out the oxidizer so all of the fuel can be used up to produce energy in the reaction. Jay Bennett, Popular Mechanics, "So Long TNT, There's a New Explosive in Town," 2 July 2018 In this case the effervescent tablet is the fuel and water the oxidizer. Renee Morad, Scientific American, "Build the Best Alka-Rocket Ever—with Science," 7 Sep. 2017 In modern rockets, such as the Space X Falcon 9 or the Saturn V, the propulsion system is powered by a fast, exothermic reaction between a liquid fuel (usually hydrogen, methane or hydrazine) and oxidizer (usually oxygen or nitrogen tetroxide). Renee Morad, Scientific American, "Build the Best Alka-Rocket Ever—with Science," 7 Sep. 2017 After all, rockets bring along their own oxidizers, so why not race cars? Jonathan M. Gitlin, Ars Technica, "7:57:148—Volkswagen makes racing history with record-breaking electric race car," 29 June 2018 The autophage engine consumes a propellant rod that has solid fuel on the outside and oxidizer on the inside, according to PhysOrg. Eric Berger, Ars Technica, "Rocket Report: SpaceShipTwo soars, BFR engine advances, a self-eating booster," 1 June 2018 Just as full-sized rockets rely on reactions between fuel and oxidizer, so do Alka-Rockets. Renee Morad, Scientific American, "Build the Best Alka-Rocket Ever—with Science," 7 Sep. 2017 By sending that rod into the blazing hot engine running at temperatures ranging around 3,200 °C, or around 5,800 °F, the fuel and oxidizer are obliterated and turned into gases. David Grossman, Popular Mechanics, "'Autophage' Rocket Would Devour Itself For Fuel," 24 May 2018 In another building at Promontory, the segments are lowered into an underground shaft where they will be loaded with solid rocket fuel, a mixture of aluminum powder fuel and ammonium perchlorate as the oxidizer. Joe Pappalardo, Popular Mechanics, "Solid Rocket City: The Utah Space Center Fighting for Its Life," 4 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'oxidizer.' 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 oxidizer

1850, in the meaning defined above

Keep scrolling for more

Learn More about oxidizer

Statistics for oxidizer

Last Updated

10 Sep 2018

Look-up Popularity

Time Traveler for oxidizer

The first known use of oxidizer was in 1850

See more words from the same year

More from Merriam-Webster on oxidizer

See words that rhyme with oxidizer

Comments on oxidizer

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


lying above or upon

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
True or False

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


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!