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black diamond

 - 3 dictionary results

black diamond

–noun
1. carbonado 1 .
2. black diamonds, coal.

Origin:
1910–15
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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black diamond  
n.  
  1. See carbonado2.

  2. black diamonds Coal.

car·bo·na·do 2   (kär'bə-nā'dō, -nä'-)   
n.   pl. car·bo·na·does
A form of opaque or dark-colored diamond used for drills. Also called black diamond.

[Portuguese, from carbone, carbon, from French; see carbon.]
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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