Escorial | ‖prop. n. [ Prop. Sp. escorial, i. e., a hill or heap of rubbish, earth, and stones brought out of a mine, fr. escoria dross of metal, L. scoria, fr. Gr. &unr_;. Cf. Scoria. ] A palace and mausoleum of the kings of Spain, being a vast and wonderful structure about twenty-five miles northwest of Madrid; called also ☞ The ground plan is said to be in the form of a gridiron, the structure being designed in honor of |