/ Dictionary / Index M mithridatism: Meaning and Definition of Find definitions for: mith•ri•da•tism Pronunciation: (mith'ri-dā"tiz-um), [key] — n. the production of immunity against the action of a poison by taking the poison in gradually increased doses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mithridates VI mithridatize Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language