iron oxide


Definition of iron oxide

: 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

Basaltic lava, which erupts around 1,100 degrees Celsius (2,012 degrees Fahrenheit), contains magnetite, an iron oxide whose outermost electrons orient themselves along the Earth’s magnetic field. Emily Toomey, Smithsonian, "Earth’s Magnetic Field Could Take Longer to Flip Than Previously Thought," 8 Aug. 2019 In last week’s seizure, a narcotics detector dog smelled the drug inside barrels of iron oxide, leading officers to search and find 50 sealed bags of the white powdery substance, according to the customs agency. Chris Palmer,, "Feds say 110 pounds of fentanyl valued at $1.7M seized in Philly," 2 July 2018 Chemical analysis of this outer layer revealed high levels of iron oxide, indicating a rapid change in the statue’s environment. The Economist, "Buried metal artefacts gather stories on their surfaces," 4 July 2019 Instead, Geobacter transfers its electrons to iron oxide, or rust, Dr. Lovley and his colleagues discovered. New York Times, "Wired Bacteria Form Nature’s Power Grid: ‘We Have an Electric Planet’," 1 July 2019 Photo: Alanna Hale for The Wall Street Journal And her deep-red kitchen counter, tinted with powdered iron oxide, was poured in place and then buffed to a high polish to resemble terrazzo. Amy Gamerman, WSJ, "The Rise of the Fashionable Concrete Home," 9 Aug. 2018 The iron oxides provide the color and the talc provides the texture, according to a 2017 Inverse article that analyzed the ingredients. Cheryl Wischhover, Vox, "How spray-on hair does (and doesn’t) work," 17 Dec. 2018 According to the listing, the ingredients include a propellant, alcohol, iron oxides, talc, and fumed silica. Cheryl Wischhover, Vox, "How spray-on hair does (and doesn’t) work," 17 Dec. 2018 For example, many of the colorants that are used in makeup are mineral pigments, iron oxides, ultramarine colorants, etc. Joyann King, Harper's BAZAAR, "Why You Can't "Print" Quality Cosmetics," 9 May 2014

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'iron oxide.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of iron oxide

1790, in the meaning defined above

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Last Updated

2 Sep 2019

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The first known use of iron oxide was in 1790

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More Definitions for iron oxide

iron oxide


Medical Definition of iron oxide

: any of several oxides of iron especially : ferric oxide

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authorized for issue (as a bond)

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