消光 Traditional form: 消光 Pinyin (reading): xiāoguāng Definitions: (optics) extinction Characters: 消 - news, rumors; to die out, to melt away, to vanish 光 - light; bright, brilliant; only, merely Traditional characters: 消 - news, rumors; to die out, to melt away, to vanish 光 - light; bright, brilliant; only, merely