What is "absis"

Apse \Apse\ ([a^]ps), n.; pl. Apses ([a^]p"s[e^]z). [See Apsis.]

1. (Arch.)

   1. A projecting part of a building, esp. of a church, having in the plan a polygonal or semicircular termination, and, most often, projecting from the east end. In early churches the Eastern apse was occupied by seats for the bishop and clergy. Hence:

   2. The bishop's seat or throne, in ancient churches.

2. A reliquary, or case in which the relics of saints were kept.

   Note: This word is also written apsis and absis.

n. (alternative spelling of apsis English)