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Al⋅tair

   [al-tair, -tahyuhr, al-tair, -tahyuhr]
–noun
a first-magnitude star in the constellation Aquila.
Origin:
< Ar (al-nasr) al-ṭā'ir (the) flying (eagle)
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
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Al·tair     (āl-tīr', -târ', āl'tīr', -târ')  Pronunciation Key 
n.   A very bright, variable double star in the constellation Aquila, approximately 15.7 light-years from Earth.


[Arabic (an-nasr) aṭ-ṭā'ir, the flying (eagle) : al-, the + ṭā'ir, flying, active participle of ṭāra, to fly; see ṭyr in Semitic roots.]

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Altair 
bright star in the constellation Aquila, 16c., from Arabic Al Nasr al Tair "the Flying Eagle," from tair, part. of tara "it flew."

Online Etymology Dictionary, © 2001 Douglas Harper
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altair

noun
double star 15.7 light years from Earth; the brightest star in the Aquila constellation 

WordNet® 3.0, © 2006 by Princeton University.
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Altair   (āl-târ', -tīr')  Pronunciation Key 
A bright white star in the constellation Aquila. Altair is a main-sequence star in the Hertzprung-Russell diagram. It is the 12th brightest star in the night sky, with an apparent magnitude of 0.77. Altair, along with Vega and Deneb, form the Summer Triangle asterism. Scientific name: Alpha Aquilae.

The American Heritage® Science Dictionary
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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