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apsis

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noun ap·sis \ˈap-səs\

Definition of apsis

plural

apsides

play \-sə-ˌdēz\

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

  2. 2 :  apse 2

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Origin and Etymology of apsis

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

Learn More about apsis

  1. Britannica.com: Encyclopedia article about apsis

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