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oxidizer

American

[ok-si-dahy-zer] / ˈɒk sɪˌdaɪ zər /

noun

Chemistry.

oxidant.

oxidizer British

/ ˈɒksɪˌdaɪzə /

noun

an oxidant, esp a substance that combines with the fuel in a rocket engine

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

antioxidizer

noun

Etymology

Origin of oxidizer

First recorded in 1870–75; oxidize + -er ¹

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

oxidizer

An oxidizer is a chemical that helps fuel burn inside a rocket or spacecraft propulsion system, making it an essential part of the vehicle's ability to maneuver.

From Science Daily ● Sep. 1, 2026

Liquid-fuel rockets, on the other hand, can be cycled on and off and combine an oxidizer, like cryogenic liquid oxygen, often with liquid hydrogen.

From The Wall Street Journal ● Jun. 14, 2026

Yuri Borisov, head of Roscosmos state space corporation, said the automatic safety system canceled the launch after registering a flaw in the oxidizer tank pressurization system.

From Seattle Times ● Apr. 9, 2024

At around that time, a delivery driver arrived with 4,000 gallons of an unspecified oxidizer.

From Washington Times ● Dec. 30, 2023

A rocket solves this problem by carrying everything it needs with it, not only fuel but also the oxidizer needed to mix with the fuel and cause it to burn.

From "Flying to the Moon: An Astronaut's Story" by Michael Collins

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023