nappe
n.（名词）A sheet of water flowing over a dam or similar structure.水幕：从坝顶或类似的构造物落下一层水Geology A large sheetlike body of rock that has been moved far from its original position.【地质学】 移动的岩石：被移于远离原先位置的巨大层状岩石Mathematics Either of the two parts into which a cone is divided by the vertex.【数学】 锥顶片：位于锥顶两边而形成一个锥体的两片中的一片
来源：French [tablecloth, nappe] 法语 [桌布，帘] from Old French [tablecloth] 源自 古法语 [桌布] from Latin mappa [napkin] * see map 源自 拉丁语 mappa [餐巾] *参见 map
