flying buttress

flying-buttress的词性：
n.Architecture （名词）【建筑学】

1. A masonry support consisting usually of a pier or buttress standing apart from the main structure and connected to it by an arch along which the thrust, as from the vaulting, is borne.Also called arc-boutant
拱扶垛：一种硅石砌体构筑物，通常由桥墩或偏离主要结构并通过拱门与其相连的拱壁组成，沿着拱门可从拱形圆顶产生推力也作 arc-boutant