Webster’s Revised Unabridged Dictionary · 1913
Exedra
Ex′e·dra (ĕks′ē·drȧ), n.; pl. Exedræ (- drē). [L., fr. Gr ἐξέδρα; ἐξ out + ἕδρα seat.] 1. (Class. Antiq.) A room in a public building, furnished with seats.
2. (Arch.) (a) The projection of any part of a building in a rounded form. (b) Any out-of-door seat in stone, large enough for several persons; esp., one of curved form.