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  bottommost bottom round  
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   The American Heritage® Dictionary of the English Language: Fourth Edition.  2000.
 
bottom quark
 
NOUN:abbr. b A quark with a charge of -1/3 and a mass about 10,000 times that of the electron. Also called beauty quark. See table at subatomic particle.
 
 
The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved.

CONTENTS · INDEX · ILLUSTRATIONS · BIBLIOGRAPHIC RECORD
  bottommost bottom round  
 
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