fer·​rous | \ ˈfer-əs How to pronounce ferrous (audio) , ˈfe-rəs \

Definition of ferrous

1 : of, relating to, or containing iron
2 : being or containing divalent iron

Examples of ferrous in a Sentence

Recent Examples on the Web The red’s ferrous minerality and salty ocean tang make this pour especially beguiling. BostonGlobe.com, 4 May 2021 Eventually, the scheme will expand to cover not just the power sector but other sectors as well, including petrochemicals, building materials, steel, non-ferrous metals, paper and domestic aviation. Scott Carpenter, Forbes, 2 Mar. 2021 Output in some sectors -- including iron and steel, coke and non-ferrous metals -- have exceeded levels seen during the same period in previous years, the ministry said. Bloomberg.com, 15 Nov. 2020 Then, Caplan says, the last remnants—the long-simmering white dwarfs—will reignite like trick birthday cake candles as their centers are finally dense and ferrous enough to react. Caroline Delbert, Popular Mechanics, 24 Aug. 2020 This oxidized the iron present in the sand needed to produce glass, clearing up its blue-green tint by transforming ferrous to paler ferric. Alex Fox, Smithsonian Magazine, 5 Aug. 2020 With impressive specificity, EBC Brakes says that 92 percent of the brake dust on a wheel is ferrous metal material. Car and Driver, 10 Apr. 2020 Specifically, the four iron atoms in hemoglobin are oxidized from their normal ferrous state (Fe2+) to a ferric form (Fe3+), making methemoglobin, which is essentially useless as an oxygen carrier. Beth Mole, Ars Technica, 23 Sep. 2019 Even the most robust bike is going to show the effects of constant salt air bombardment, and the Coasts did reveal their few ferrous parts—the nut and bolt under the seat post, for instance. Ezra Dyer, Popular Mechanics, 18 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ferrous.' 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 ferrous

1755, in the meaning defined at sense 1

History and Etymology for ferrous

New Latin ferrosus, from Latin ferrum

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The first known use of ferrous was in 1755

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Dictionary Entries Near ferrous



ferrous chloride

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Cite this Entry

“Ferrous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ferrous. Accessed 19 Oct. 2021.

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More Definitions for ferrous



English Language Learners Definition of ferrous

: of, relating to, or containing iron


fer·​rous | \ ˈfer-əs How to pronounce ferrous (audio) \

Medical Definition of ferrous

1 : of, relating to, or containing iron
2 : being or containing iron with a valence of two


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