apoapsis.
The point of a body's elliptical orbit about the system's centre of mass where the distance between the body and the centre of mass is at its maximum.
Meaning & usage
The point of a body's elliptical orbit about the system's centre of mass where the distance between the body and the centre of mass is at its maximum.
Where this word comes from
Etymology tree Proto-Indo-European *h₂ep Proto-Indo-European *-o Proto-Indo-European *h₂epó Proto-Hellenic *apó Ancient Greek ᾰ̓πό (ăpó) Ancient Greek ᾰ̓πο- (ăpo-)bor. English apo- English apsis English apoapsis From apo- + apsis.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.