What does "apsis" mean?
Apsis: (Math.) In a curve referred to polar coördinates, any point for which the radius vector is a maximum or minimum.
Additional senses
- 2.(Arch.) Same as Apse.
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Published: 2026-07-17T00:00:00-07:00 · Modified: 2026-07-17T00:00:00-07:00