astragal
/ˈæstrəgəl/noun
1- a convex moulding or wooden strip across a surface or separating panels, typically semicircular in cross section（平面或镶板上截面为半圆状的）凸面装饰线（或板条）。
1.1
- Architecture a small semicircular moulding round the top or bottom of a column【建筑】（柱顶或底部的）半圆饰; 圆剖面小线脚。
1.2
- a glazing bar, typically one used in cabinetmaking抛光嵌条（用于细木工）。
词源
mid 17th cent.: from ASTRAGALUS, partly via French astragale.