根据美国传统词典
One of the many small,platelike dermal or epidermal structures that characteristically form the external covering of fishes,reptiles,and certain mammals.
鳞：一种覆盖在鱼、爬行动物和某些哺乳动物体表的典型的小盘状表皮结构
scale
来自拉丁语scala 梯子＜scandere爬,攀登