Do you know ghouls from goblins and ghosts?
disease characterized by purple patches on the skin, 1753, from Modern Latin, from Latin purpura "purple dye" (see purple (n.)). Related: Purpuric.
purpura pur·pu·ra (pûr'pə-rə, -pyə-)n. A condition characterized by hemorrhages in the skin and mucous membranes that result in the appearance of purplish spots or patches. Also called peliosis.