fer·​rous | \ˈfer-əs, 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

Steel Dynamics, which has facilities located in the U.S. and in Mexico, produces steel products, liquid pig iron, and processes and sells ferrous and nonferrous scrap. Aisha Al-muslim, WSJ, "Steel Dynamics Gets Boost From Improved Demand for Steel," 19 Apr. 2018 Behind him, past scavenging and defecating prisoners, is a fence of barbed wire, and beyond it, a sky of ferrous gray. Jason Farago, New York Times, "Walk Through This Exhibition With Dread. You Know Where It Leads.," 5 Apr. 2018 Surveillance footage later revealed Dagley drilled into tanks of sodium cyanide, hydrochloric acid, yellow chromate, ferrous chloride, and sulfuric acid, according to a current owner, Ed Cochran. Courtney Astolfi, cleveland.com, "Man drilled holes in tanks of cyanide, acid at Cleveland company he once owned, police said," 30 Aug. 2017 Ferrous materials will show signs of rust so •Check for rust on screws in the console areas. Bill Alkofer, Orange County Register, "Here’s what to look for in buying a used car that could have water damage," 7 Feb. 2017 Few people outside the repair industry know this, but the posted body shop labor hours on aluminum are at least two and possibly three times those on ferrous metal. Ed Wallace, star-telegram.com, "Insurance: Consumer Bill of Rights," 16 June 2017 Brantley, 102, who served as chief of the Interior Department’s ferrous metals division before retiring in 1980, died May 11 at his home in Arlington, Va. Washington Post, "Notable deaths in the Washington area," 1 June 2017 Vale sees S11D bringing lower upkeep costs and higher margins, ferrous minerals director Peter Poppinga said in November. Paul Kiernan, WSJ, "A Geographic Shift in Brazil Mining Leaves a Storied Region Hurting," 19 Dec. 2016 Frehiwot Reta, the chef, ferments the bread for three days, and the result is fresh, springy, and tartly ferrous. Nicolas Niarchos, The New Yorker, "Abyssinia," 14 Mar. 2016

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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English Language Learners Definition of ferrous

: of, relating to, or containing iron


fer·​rous | \ˈfer-əs \

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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