雄ゆう黄おうゆうおうMeanings1nounorpimentmineralogyA mineral, arsenic trisulfide, used historically as a pigment and in traditional medicine. Technical term in mineralogy.See also: 石黄雄ゆう黄おうは黄き色いろの顔がん料りょうとして古ふるくから使つかわれてきた。Orpiment has been used as a yellow pigment since ancient times.