ppb

or p.p.b.

PPB

or P.P.B.

  1. (in publishing) paper, printing, and binding.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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ppb in Medicine

ppb

abbr.
  1. parts per billion
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.