外阴 Traditional form: 外陰 Pinyin (reading): wàiyīn Definitions: vulva Characters: 外 - out, outside, external; foreign; in addition 阴 - the female principle; dark, shaded; hidden, implicit, secret Traditional characters: 外 - out, outside, external; foreign; in addition 陰 - the female principle; dark, shaded; hidden, implicit, secret