from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The fourth brightest star in the sky and the brightest star in the constellation Boötes, approximately 36 light-years from Earth.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. A bright yellow-orange star in the constellation Boötes; Alpha (α) Boötis. It is the third brightest star in the night sky.
from the GNU version of the Collaborative International Dictionary of English
- n. A fixed star of the first magnitude in the constellation Boötes.
from The Century Dictionary and Cyclopedia
- n. A yellow star in the northern hemisphere, the fourth in order of brightness in the entire heavens.
- n. A genus of isopod crustaceans, of the family Idoteidœ or Arcturidœ.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the 4th brightest star and the brightest star in the constellation Bootes; 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-3 in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
Borrowed from Latin Arctūrus. (Wiktionary)