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apsis
[ ap-sis ]
noun
, plural ap·si·des [ap, -si-deez].
- Astronomy. either of two points in an eccentric orbit, one higher apsis farthest from the center of attraction, the other lower apsis nearest to the center of attraction.
- Architecture. an apse.
apsis
/ ˈæpsɪs; æpˈsaɪdəl; ˈæpsɪdəl /
noun
- Also calledapse either of two points lying at the extremities of an eccentric orbit of a planet, satellite, etc, such as the aphelion and perihelion of a planet or the apogee and perigee of the moon. The line of apsides connects two such points and is the principal axis of the orbit
- another name for apse
apsis
/ ăp′sĭs /
, Plural apsides ăp′sĭ-dēz′
- In the path of an orbiting body, either of the two points at which it is closest to or farthest away from the body it is orbiting.
- See also apoapsis
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Derived Forms
- apsidal, adjective
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Word History and Origins
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Word History and Origins
Origin of apsis1
C17: via Latin from Greek; see apse
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Example Sentences
The nave of the chapel is in tolerably good preservation, but the apsis has suffered severely from damp.
From Project Gutenberg
The tomb is in the wall, behind a range of pillars, which form a kind of open screen round the apsis.
From Project Gutenberg
But the choir and apsis were previously of a different æra from the rest of the edifice.
From Project Gutenberg
The seven-sided apsis with ambulatory, on which open out seven pentagonal radiating chapels.
From Project Gutenberg
Between the apsis and the nave stood the altar, or rather the common table, canopied by a baldachin supported by columns.
From Project Gutenberg
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