Mithridate \Mith"ri*date\, n. (Med.)
An antidote against poison, or a composition in form of an
electuary, supposed to serve either as a remedy or a
preservative against poison; an alexipharmic; -- so called
from King Mithridates, its reputed inventor.
[1913 Webster]
[Love is] a drop of the true elixir; no mithridate so
effectual against the infection of vice. --Southey.
[1913 Webster]