iron oxide

noun

Definition of iron oxide 

: any of several oxides of iron: such as

a : ferric oxide

b : the monoxide FeO of iron

Examples of iron oxide in a Sentence

Recent Examples on the Web

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 Rather than radioactive tracers, the new method sends an iron oxide contrast agent through the patient's body. John Ericson, Newsweek, "Death Rays," 2 Apr. 2014 The rock itself is a combination of sandstone and limestone, with magnesium and iron oxide deposits. Jennifer Billock, Smithsonian, "Shimmy Through the World’s Most Spectacular Slot Canyons," 10 Mar. 2017 Decades later, researchers figured out that this waterfall owes its brilliant hue to iron oxide—basically rust. Jason Daley, Smithsonian, "Antarctica’s Blood Falls Helps Unravel the Inner Workings of Glaciers," 2 May 2017 These gases could react with the iron oxide molecules as they're carried through the atmosphere to form soluble forms of iron. Ben Panko, Smithsonian, "Human Pollution May Be Fertilizing The Oceans. That’s Not a Good Thing," 2 Mar. 2017 The showerhead, which is now available on T3’s website and at Macy's, helps cut down on hair-color-wrecking minerals (like smelly hydrogen sulfide and rusty iron oxide) in tap water while additionally removing up to 95 percent of free chlorine. Lauren Swanson, Allure, "This Showerhead Promises to Give You The Shiniest Hair EVER," 1 Nov. 2017 There’s plenty to take: Mars is home to precious metals ripe for telerobotic mining and a wealth of iron oxides (which give the planet its red color). Maryam Zaringhalam, Slate Magazine, "Even Moving to Mars Has Become Political (and Depressing)," 16 June 2017

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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The first known use of iron oxide was in 1790

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More Definitions for iron oxide

iron oxide

noun

Medical Definition of iron oxide 

: any of several oxides of iron especially : ferric oxide

More from Merriam-Webster on iron oxide

Britannica.com: Encyclopedia article about iron oxide

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