a substance supposed
to be an antidote against all poisons
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'mithridate'ML mithridatum < LL mithridatium < Mithridatius, of Mithridates VI, said to have become immune to poisons by taking them in gradually