Визначення слова «apsis» мовою англійська

noun

1. (architecture) A recess or projection, with a dome or vault, at the east end of a church; an apse.

2. (astronomy) 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