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ferrous

[fer-uh s]
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adjective Chemistry.
  1. of or containing iron, especially in the bivalent state.
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Origin of ferrous

1860–65; < Latin ferr(um) iron + -ous
Related formspre·fer·rous, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for ferrous

ferrous

adjective
  1. of or containing iron in the divalent state; designating an iron (II) compound
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Word Origin

C19: from ferri- + -ous
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for ferrous

adj.

"pertaining to or containing iron," 1865, from Latin ferreus "made of iron," from ferrum "iron" (see ferro-). In chemistry, "containing iron," especially with a valence of two.

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Online Etymology Dictionary, © 2010 Douglas Harper

ferrous in Medicine

ferrous

(fĕrəs)
adj.
  1. Of, relating to, or containing iron, especially with a valence of 2 or a valence lower than in a corresponding ferric compound.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

ferrous in Science

ferrous

[fĕrəs]
  1. Containing iron, especially iron with a valence of 2. Compare ferric.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.