[ fuh-roo-juh-nuh s ]
/ fəˈru dʒə nəs /


Geology. iron-bearing: ferruginous clays.
of the color of iron rust.

Origin of ferruginous

1655–65; < Latin ferrūginus rust-colored, derivative of ferrūgin-, stem of ferrūgō iron-rust, derivative of ferrum iron; see -ous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ferruginous

British Dictionary definitions for ferruginous

/ (fɛˈruːdʒɪnəs) /


(of minerals, rocks, etc) containing irona ferruginous clay

Word Origin for ferruginous

C17: from Latin ferrūgineus of a rusty colour, from ferrūgō iron rust, from ferrum iron
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

Medicine definitions for ferruginous

[ fə-rōōjə-nəs ]


Associated with or containing iron.
Having the color of iron rust; reddish-brown.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.