What's the difference between exedra and exedrae?

Exedra

Definition:

• (n.) A room in a public building, furnished with seats.
• (n.) The projection of any part of a building in a rounded form.
• (n.) Any out-of-door seat in stone, large enough for several persons; esp., one of curved form.

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Exedrae

Definition:

• (pl. ) of Exedra

Example Sentences: