exedra
/ˈeksɪdrə/noun
( pl.exedrae /-driː/)
1- Architecture a room, portico, or arcade with a bench or seats where people may converse, especially in ancient Roman and Greek houses and gymnasia【建筑】（尤指古罗马和希腊的家中和练身房中的）有座谈话间; 有座门廊（或拱廊）。
1.1
- an outdoor recess containing a seat半圆形室外坐椅, 龛座。
词源
Latin, from Greek ex- 'out of'+hedra 'seat'.