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.

[Love is] a drop of the true elixir; no mithridate so effectual against the infection of vice. --Southey.

Source: Webster's Revised Unabridged Dictionary (1913)