mithridate

noun3

1. •
   (historical) Any of various historical medicines, typically an electuary compounded with various poison, believed to derive from Mithridates VI and to serve as a universal antidote.

   • Auicen saythe; There be certeyne medicins... which wyl not suffre poyson to approche nere the harte, as triacle and Metridate. — 1528
2. •
   (figurative, no longer used) Synonym of cure.

   • The contemplation was a mithridate to a pestered conceipted minde. — 1587
3. •
   (no longer used, rare) Ellipsis of mithridate mustard.