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definitions
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BBB

  1. a quality rating for a corporate or municipal bond, lower than A and higher than BB.
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BBB

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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bbb in Medicine

BBB

abbr.
  1. blood-brain barrier
  2. bundle-branch block
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.