contradistinguish definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
to distinguish (one thing from another) by contrasting
contradistinguish definition by American Heritage Dictionary
transitive verb con·tra·dis·tin·guished, con·tra·dis·tin·guish·ing, con·tra·dis·tin·guish·es
To distinguish by contrasting qualities.