casement

名词 casement:

1. a window sash that is hinged (usually on one side)

1. A casement is a window that opened by means of hinge at the side.
   竖铰链窗是一种用边上的铰链开启的窗户。
2. There are two casements in this room.
   这间屋子有两扇窗户。

case.ment

n.（名词）

A window sash that opens outward by means of hinges.
窗框：通过折叶向外开的窗框
A window with such sashes.
窗子：带有这样窗框的窗户
A case or covering.
盒子，盖子

来源：
Middle English [a hollow molding]
中古英语 [一个空心的铸造物]
possibly from Middle English case [chest, frame] * see case 2
可能源自 中古英语 case [盒子，框架] *参见 case2

【引伸】
case.mented
adj.（形容词）