[fer-oh-mag-nee-zhuh n, -shuh n]
(of minerals and rocks) containing iron and magnesium.
Origin of ferromagnesian
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for ferromagnesian
Historical Examples of ferromagnesian
Biotite and all ferromagnesian minerals rarely appear in them, and never are in considerable amount.
Hornblende and biotite are the ferromagnesian constituents and vary much in relative importance.Mount Rainier
(of minerals such as biotite) containing a high proportion of iron and magnesium
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
Containing iron and magnesium. Magnetite and hornblende are ferromagnesian minerals.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.