quinfecta n. an achievement made up of five major parts. Also quintfecta. Etymological Note: From “quinque” or “quin(t)us” Latin for “five” and “fifth,” plus “perfecta,” a winning horse-racing bet in which the first and second finishers are predicted in the correct order, and the “trifecta,” in which the first three finishers are predicted in the correct order. (source: Double-Tongued Dictionary)