a pathological condition resulting from a reaction to or an excessive use of cinchona bark or any of its derivatives, as quinine: it is characterized by headache, ringing in the ears, deafness, etc.
Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.