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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.

Hydroxyl plays a key role in the atmosphere as its primary oxidizer.

From Science Daily • Apr. 21, 2026

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

From Washington Times • Dec. 30, 2023

The fuel and oxidizer need to be loaded on-site ahead of launch, which can be time-consuming.

From Washington Post • Apr. 28, 2023

This is why you never want to use chlorine bleach or any other oxidizer to clean redwood.

From Seattle Times • Nov. 7, 2022

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

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