a window or part of a window set on a vertical hinge so that it opens like a door 竖铰链窗 ■(chieflypoetic/literary)a window (主诗/文)窗户 ■the sash of a sash window 窗框
语源
late Middle English (as an architectural term denoting a hollow moulding): from Anglo-Latin cassimentum, from cassa, from Latin capsa (see case)