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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ferr

Historical Examples of ferr

British Dictionary definitions for ferr


combining form

indicating the presence of iron, esp in the trivalent stateferricyanide; ferriferous Compare ferro-

Word Origin for ferri-

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

ferr in Medicine



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.