朴硝 Traditional form: 朴硝 Pinyin (reading): pòxiāo Definitions: (impure) mirabilite, Na2SO4x10H2O (used in TCM) Characters: 朴 - plain, simple; sincere; surname 硝 - saltpeter; to tan leather Traditional characters: 朴 - plain, simple; sincere; surname 硝 - saltpeter; to tan leather