[ hĕt′ə-rō-krō′mē-ə ]
A difference in coloration in two structures or two parts of the same structure that are normally alike in color.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for heterochromia
You have heterochromia, which is pretty unique, with your left eye blue and right eye green.Alice Eve, the Beautiful New Trekkie, Talks ‘Star Trek Into Darkness’|Marlow Stern|May 18, 2013|DAILY BEAST