tournedos (n.)youdaoicibaDictYouDict[tournedos 词源字典]
fillet of steak dish, 1877, from French, from tourner "to turn" (see turn (v.)) + dos "back." According to French etymologists, "so called because the dish is traditionally not placed on the table but is passed behind the backs of the guests" [OED]. But there are other theories.[tournedos etymology, tournedos origin, 英语词源]