icono-

icono-

or icon-
pref.
Image; icon: iconolatry.

[Medieval Greek eikono-, from eikōn, image, icon, from Greek, likeness, image; see icon.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

icono-

or before a vowel

icon-

combining form
indicating an image or likeness: iconology.
[from Greek: icon]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

icono-

a combining form meaning “image,” “likeness”: iconology.
[< Latin < Greek eikono-, comb. form of eikṓn icon]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.