寸阴 Traditional form: 寸陰 Pinyin (reading): cùnyīn Definitions: a very brief period of time (lit. the time it takes for a shadow to move an inch) Characters: 寸 - inch; small, tiny 阴 - the female principle; dark, shaded; hidden, implicit, secret Traditional characters: 寸 - inch; small, tiny 陰 - the female principle; dark, shaded; hidden, implicit, secret