apsis

Plural: apses, apsides

Noun

• An orbital point nearest or farthest from the center of attraction.
• a domed or vaulted recess or projection on a building especially the east end of a church; usually contains the altar
• A recess or projection, with a dome or vault, at the east end of a church; an apse.
• 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

Examples

• He was at the apsis of his game, the farthest point from a victory.

Synonyms

apse, apside