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nouna domed or vaulted recess or projection on a building especially the east end of a church; usually contains the altar
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Definition that contains apsis
- double used of homologous chromosomes associated in pairs in synapsis
- perigee periapsis in Earth orbit; the point in its orbit where a satellite is nearest to the Earth
- apogee apoapsis in Earth orbit; the point in its orbit where a satellite is at the greatest distance from the Earth
- apolune apoapsis in orbit around the moon
- periselene periapsis in orbit around the moon
- apojove apoapsis in orbit around Jupiter
- perihelion periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun
- aposelene apoapsis in orbit around the moon
- true anomaly the angular distance of a point in an orbit past the point of periapsis measured in degrees
- bivalent used of homologous chromosomes associated in pairs in synapsis