Alpha Centauri Definition
ălfə sĕn-tôrē
noun
A multiple star in Centaurus, 4.4 light years from Earth, whose three components form the brightest object in the constellation and the third brightest star in the night sky.
American Heritage
A binary star, the brightest star in the constellation Centaurus: magnitude, –0.01: it is the nearest of the stars that are visible to the naked eye, except for the sun.
Webster's New World
Synonyms:
- Rigil
- rigil-kent
pronoun
(astronomy) The brightest star in the southern constellation of Centaurus. It is actually a binary star with Proxima Centauri as a third component.
Wiktionary
Origin of Alpha Centauri
From α (brightest) + Centauri ("of the constellation Centaurus")
From Wiktionary
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