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Webster's New World College Dictionary » Coal Sack
Coal Sack
Variant of Coalsack
Coalsack
definition
Coal·sack (kōl′sak′)
noun
Astron. a prominent dark nebula in the Milky Way near the constellation Crux: usually with the
sometimes written Coal Sack
Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
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