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nadir

[ney-der, ney-deer] Example Sentences Origin

na·dir

[ney-der, ney-deer]
noun
1.
Astronomy. the point on the celestial sphere directly beneath a given position or observer and diametrically opposite the zenith.
2.
Astrology. the point of a horoscope opposite the midheaven: the cusp of the fourth house.
3.
the lowest point; point of greatest adversity or despair.

Origin:
1350–1400; Middle English Arabic naẓīr over against, opposite to (the zenith)

na·dir·al, adjective

nadir, zenith.


3. bottom, floor, foot, depths.

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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Nadir is always a great word to know.
So is altitude. Does it mean:
the angular distance of a heavenly body above the horizon
a bright red supergiant star in the constellation Orion
Example Sentences
  • This is controversial stuff but an undiluted joy to anyone who feels that the last 11 years represent a nadir in American society.
  • This spiritual nadir came as his career began to peak.
  • Then came the nadir of his season, the 81 in the Memorial.
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Collins
World English Dictionary
nadir (ˈneɪdɪə, ˈnæ-)
 
n
1.  the point on the celestial sphere directly below an observer and diametrically opposite the zenith
2.  the lowest or deepest point; depths: the nadir of despair
 
[C14: from Old French, from Arabic nazīr as-samt, literally: opposite the zenith]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

nadir
c.1391, in astronomical sense, from M.L. nadir, from Arabic nazir "opposite to," in nazir as-samt, lit. "opposite of the zenith," from nazir "opposite" + as-samt "zenith" (see zenith). Transf. sense of "lowest point (of anything)" is first recorded 1793.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
nadir   (nā'dər)  Pronunciation Key 
The point on the celestial sphere that is directly below the observer (90 degrees below the celestial horizon). Compare zenith.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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