Apsis

Definitions

1. A recess or projection, with a dome or vault, at the east end of a church.
2. Either of the points in the elliptical orbit of a planet, comet, or moon where it is closest or furthest from the body it orbits; examples are perihelion, aphelion, perigee, and apogee.

Equivalents

Examples

“Like⟳ Henry's collegiate church […] the cathedral is a cruciform basilica of the double⟳ bay system with four square bays in the central nave, western transoms, a quadrum for the choir, an apsis, and a transept with auxiliary apses.”

CEFR level