炼丹 Traditional form: 煉丹 Pinyin (reading): liàndān Definitions: to concoct pills of immortality Characters: 炼 - to smelt, to refine; to distill, to condense 丹 - cinnabar, red, vermilion; pellet, powder Traditional characters: 煉 - to smelt, to refine; to distill, to condense 丹 - cinnabar, red, vermilion; pellet, powder