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Related to Arcturus: Antares
The fourth brightest star in the sky and the brightest star in the constellation Boötes, approximately 36 light years from Earth.
[Middle English, from Latin Arctūrus, from Greek Arktouros : arktos, bear; see r̥tko- in Indo-European roots + ouros, guard (from its position behind Ursa Major); see wer- in Indo-European roots.]
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.
(Celestial Objects) the brightest star in the constellation Boötes: a red giant. Visual magnitude: –0.4; spectral type: K2III; distance: 37 light years
[C14: from Latin, from Greek Arktouros, from arktos bear + ouros guard, keeper]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Arc•tu•rus(ɑrkˈtʊər əs, -ˈtyʊər-)
a first-magnitude star in the constellation Boötes.
[1352–75; < Middle French < Latin < Greek Arktoûros=árkt(os) bear (see Ursa Major) + oûros guardian]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
The brightest star in the Northern Hemisphere. It is in the constellation Boötes.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||1.||Arcturus - the 4th brightest star and the brightest star in the constellation Bootes; 36 light-years from Earth|
Bootes - a constellation in the northern hemisphere near Ursa Major
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