exedra
Concise Oxford English Dictionary © 2008 Oxford University Press:
exedra /ˈɛksɪdrə, ɪkˈsiːdrə, ɛk-/
▶noun (pl. exedrae /-driː/) Architecture a room, portico, or arcade with seats where people may converse.
– origin L., from Gk ex- ‘out of’ + hedra ‘seat’.
'exedra' also found in these Oxford entries:

