apsis

noun
ap·​sis | \ˈap-səs \
plural apsides\ -​sə-​ˌdēz \

Definition of apsis 

1 : the point in an astronomical orbit at which the distance of the body from the center of attraction is either greatest or least

First Known Use of apsis

1601, in the meaning defined at sense 1

History and Etymology for apsis

New Latin apsid-, apsis, from Latin, arch, orbit, from Greek hapsid-, hapsis, from haptein to fasten

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Dictionary Entries near apsis

apse aisle

apsidal

apsidiole

apsis

apt

Aptal

Aptenodytes

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Time Traveler for apsis

The first known use of apsis was in 1601

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