Толковый словарь английского языка Oxford English Reference - grail

n. (in full Holy Grail) 1 (in medieval legend) the cup or platter used by Christ at the Last Supper, and in which Joseph of Arimathea received Christ's blood at the Cross, esp. as the object of quests by medieval knights. 2 any object of a quest. Etymology: ME f. OF graal etc. f. med.L gradalis dish, of unkn. orig.