iron oxide

noun

: any of several oxides of iron: such as
b
: the monoxide FeO of iron

Examples of iron oxide in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Other examples include iron oxides — which add color to makeup and are sun- and blue light-protective — and tocopheryl acetate, a synthetic form of vitamin E that protects skin from free radicals. Sandee Lamotte, CNN Money, 21 Oct. 2025 The sand here was created from the erosion of nearby Navajo sandstone; the rock has a reddish-orange color from the iron oxide mineral hematite. Lydia Mansel, Travel + Leisure, 21 Oct. 2025 Meanwhile, mica and iron oxides deliver an instant brightening effect, and hyaluronic acid and squalane seal in moisture for a soft, luminous finish that lasts. Michelle Rostamian, Allure, 13 Oct. 2025 Low-iron glass is made from ultrapure sand that is low in iron oxide. Aki Ishida, The Conversation, 10 Sep. 2025 See All Example Sentences for iron oxide

Word History

First Known Use

1790, in the meaning defined above

Time Traveler
The first known use of iron oxide was in 1790

Cite this Entry

“Iron oxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/iron%20oxide. Accessed 30 Oct. 2025.

Kids Definition

iron oxide

noun
: any of the oxides of iron
especially : ferric oxide

Medical Definition

iron oxide

noun
: any of several oxides of iron
especially : ferric oxide

More from Merriam-Webster on iron oxide

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