Dictionary.com
definitions
  • synonyms

ppm

See more synonyms for ppm on Thesaurus.com
  1. Also PPM, P.P.M., p.p.m. parts per million.
  2. pulse per minute.
Show More
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ppm

Contemporary Examples


British Dictionary definitions for ppm

ppm

abbreviation for
  1. chem parts per million
  2. Also: PPM peak programme meter
Show More
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for ppm

abbreviation of parts per million, attested by 1913.

Show More
Online Etymology Dictionary, © 2010 Douglas Harper

ppm in Medicine

ppm

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