Spica

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A spectroscopic binary star, 245 light years from Earth, one of the brightest stars in the sky and the brightest star in the constellation Virgo.

from The Century Dictionary.

• noun In botany, a spike.
• noun In surgery, a spiral bandage with reversed turns: so named because it was thought to resemble a spike of barley.
• noun In ornithology, a spur; a calcar.
• noun In astronomy, a very white star of magnitude 1.2, the sixteenth in order of brightness in the heavens, a Virginis, situated on the left hand of the Virgin.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Med.) A kind of bandage passing, by successive turns and crosses, from an extremity to the trunk; -- so called from its resemblance to a spike of a barley.
• noun (Astron.) A star of the first magnitude situated in the constellation Virgo.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• proper noun astronomy A binary star in the constellation Virgo; alpha (α) Virginis.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the brightest star in Virgo