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apsis

Pronunciation: /ˈapsɪs/

Definition of apsis

noun (plural apsides /-diːz/)

  • either of two points on the orbit of a planet or satellite that are nearest to or furthest from the body round which it moves.

Derivatives

apsidal

adjective

Origin:

early 17th century (denoting the orbit of a planet): via Latin from Greek apsis, hapsis 'arch, vault', perhaps from haptein 'fasten, join'

apsis in other Oxford dictionaries

Definition of apsis in the US English dictionary

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