mass noun
- a light blue or bluish-green pigment, typically prepared by adding chalk or whiting to a solution of copper nitrate, used in making crayons and as a watercolour铜盐颜料, 碳酸铜颜料（浅蓝或蓝绿色颜料, 用于制作蜡笔或用作水彩颜料）。
- of this colour铜蓝的; 铜绿的。
词源
early 16th cent.: from Old French verd de terre, literally 'earth green'.