1400, from L. tinctura "act of dyeing or tingeing," from tinctus "dye," pp. of tingere "to tinge, dye, moisten, soak," from PIE base *teng- "to soak" (cf. O.H.G. dunkon "to soak," Gk. tengein "to moisten"). Meaning "solution of medicine in a mixture of alcohol" is first recorded 1646. The verb is recorded