1 example sentence using apsis.

Apsis used in a sentence

Apsis in a sentence as a noun

This seems like yet another case of unnecessarily Earth/Sol-centric terminology, much like "apogee" being Earth specific such that you have to use "apoapsis" if you want to be generic.

Apsis definitions

noun

a domed or vaulted recess or projection on a building especially the east end of a church; usually contains the altar

See also: apse