三棱镜 Traditional form: 三稜鏡 Pinyin (reading): sānléngjìng Definitions: (triangular) prism Characters: 三 - three 棱 - squared timber; angle, corner, edge 镜 - mirror, glass; lens, glasses Traditional characters: 三 - three 稜 - edge, corner, angle; protrusion; square beam 鏡 - mirror, glass; lens, glasses