apsis

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ap·sis

 (ăp′sĭs)
n. pl. ap·si·des (-sĭ-dēz′)
1. Architecture An apse.
2. Astronomy The point of greatest or least distance of the orbit of a celestial body from the center of mass of the system.

[Late Latin, from Latin, arch, vault, from Greek hapsis, from haptein, to fasten.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

apsis

(ˈæpsɪs)
n, pl apsides (æpˈsaɪdiːz; ˈæpsɪˌdiːz)
1. (Astronomy) Also called: apse 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
2. (Architecture) another name for apse1
[C17: via Latin from Greek; see apse]
apsidal adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ap•sis

(ˈæp sɪs)

n., pl. -si•des (-sɪˌdiz)
1. either of the two points farthest or nearest the center of attraction in an eccentric astronomical orbit.
[1595–1605; < Latin < Greek hapsís (felloe of) a wheel, arch, vault, orig., fastening, derivative (of háptein to fasten]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

apsis

- The extreme point of an orbit.
See also related terms for orbit.
Farlex Trivia Dictionary. © 2012 Farlex, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.apsis - a domed or vaulted recess or projection on a building especially the east end of a churchapsis - a domed or vaulted recess or projection on a building especially the east end of a church; usually contains the altar
church building, church - a place for public (especially Christian) worship; "the church was empty"
niche, recess - an enclosure that is set back or indented
tribune - the apse of a Christian church that contains the bishop's throne
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
absidiapsidiapsiskuori