Apse
WordNet

noun


(1)   A domed or vaulted recess or projection on a building especially the east end of a church; usually contains the altar
WiktionaryText

Etymology


Via , from , from .

Noun



  1. A semicircular projection from a building, especially the rounded east end of a church that contains the altar.
  2. The nearest and furthest points to the centre of gravitational attraction for a body in orbit. More usually called an apsis.
  3. In some local dialects and in archaic usage, an aspen tree.
 
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