banister
/ˈbænɪstə(r)/(亦作bannister)
noun
(亦作banisters)
1- the structure formed by the uprights and handrail at the side of a staircase（楼梯）扶手。
1.1
- a single upright at the side of the staircase（楼梯扶手上的一根）竖杆：
I stuck my head between the banisters.
我把头卡在了楼梯扶手的竖杆中间。
词源
mid 17th cent.: from earlier barrister, alteration of BALUSTER.