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coalsack

 - 2 dictionary results

Coal⋅sack

  [kohl-sak]
Use coalsack in a Sentence
–noun Astronomy.
a dark nebula in the southern constellation Crux, whose dust particles obscure light from Milky Way stars behind it.
Also, Coal Sack.
Also called Southern Coalsack.

Origin:
1625–35; coal + sack 1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To coalsack
Coal·sack   (kōl'sāk')   
n.  

  1. A dark nebula, one of the nearest to Earth, that appears in the southern Milky Way.

  2. A similar dark nebula in the Northern Hemisphere near the constellation Cygnus.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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