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apsis
5 dictionary results for: Apsis
Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
ap·sis 
[ap-sis] Pronunciation Key
[ap-sis] Pronunciation Key –noun, plural -si·des
[-si-deez] Pronunciation Key.
[-si-deez] Pronunciation Key. | 1. | 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. |
| 2. | Architecture. an apse. |
[Origin: 1595–1605; < L < Gk hapsís (felloe of) a wheel, arch, vault, orig., fastening, equiv. to háp(tein) to fasten + -sis -sis]
]
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
American Heritage Dictionary - Cite This Source - Share This
| ap·sis
(āp'sĭs) Pronunciation Key
n. pl. ap·si·des (-sĭ-dēz')
[Late Latin, from Latin, arch, vault, from Greek hapsis, from haptein, to fasten.] |
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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
WordNet - Cite This Source - Share This
| apsis | |
noun | |
| a domed or vaulted recess or projection on a building especially the east end of a church; usually contains the altar [syn: apse] |
WordNet® 3.0, © 2006 by Princeton University.
The American Heritage Science Dictionary - Cite This Source - Share This
| apsis
(āp'sĭs) Pronunciation Key
Plural apsides (āp'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, periapsis. |
The American Heritage® Science Dictionary
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Webster's Revised Unabridged Dictionary - Cite This Source - Share This
Apsis
Ap"sis\ ([a^]p"s[i^]s), n.; pl. Apsides ([a^]p"s[i^]*d[=e]z). See Apse. [L. apsis, absis, Gr. "apsi`s, "apsi^dos, a tying, fastening, the hoop of a wheel, the wheel, a bow, arch, vault, fr. "a`ptein to fasten.]1. (Astron.) One of the two points of an orbit, as of a planet or satellite, which are at the greatest and least distance from the central body, corresponding to the aphelion and perihelion of a planet, or to the apogee and perigee of the moon. The more distant is called the higher apsis; the other, the lower apsis; and the line joining them, the line of apsides. 2. (Math.) In a curve referred to polar co["o]rdinates, any point for which the radius vector is a maximum or minimum. 3. (Arch.) Same as Apse.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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