riser

['raizə]

n.起床者, 起义者,竖板, 冒口

例句与用法:

A notched board at either side of a staircase that supports the treads and risers.

木楼梯侧板,木楼梯小梁在阶梯两边支撑楼梯的踏板和竖板的有凹口的木板

详细释义:

n.

1. 起床者; 造反者

2. (每级楼梯的)竖板