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
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The red color of the fire retardant is caused by the chemical component iron oxide, commonly known as rust. Christopher Cann, USA TODAY, 13 Jan. 2025 Although its surface is covered in iron oxide dust, the red planet appears to the naked eye to have a golden-reddish light rather than purely a red light. Jamie Carter, Forbes, 16 Jan. 2025 The art that survives today uses a color red, which comes from mixing iron oxide taken from the soil. Joshua Rapp Learn, Discover Magazine, 15 Jan. 2025 Aerial fire suppressants are generally a mixture of water, ammonium phosphate — essentially fertilizer — and iron oxide, which is added to make the retardant visible, said Daniel McCurry, a civil and environmental engineering professor at the University of Southern California. Dillon Thomas, CBS News, 13 Jan. 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

Dictionary Entries Near iron oxide

Cite this Entry

“Iron oxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/iron%20oxide. Accessed 17 Feb. 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

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