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a combining form with the meanings “iron,” “ferric,” used in the formation of compound words:
ferriferous; ferricyanide.
Also, ferro-; especially before a vowel, ferr-.
Origin of ferri-
< Latin, combining form of ferrum iron


variant of ferri- and ferro- before a vowel. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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British Dictionary definitions for ferr


combining form
indicating the presence of iron, esp in the trivalent state: ferricyanide, ferriferous Compare ferro-
Word Origin
from Latin 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
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ferr in Medicine

ferri- pref.
Iron, especially ferric ion: ferritin.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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