Advertisement

Advertisement

ppm

  1. Also PPM, P.P.M., p.p.m. parts per million.
  2. pulse per minute.


ppm

abbreviation for

  1. chem parts per million
  2. AlsoPPM peak programme meter
“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


Discover More

Example Sentences

Prior to the Industrial Revolution of the late 19th and early 20th centuries, the carbon dioxide level was about 280 ppm.

Today global atmospheric carbon dioxide concentrations are at 395 parts per million (ppm).

Atmospheric carbon-dioxide levels have risen 38% in the industrial era, from 280 to 385 parts per million (ppm).

Advertisement

Advertisement

Advertisement

Advertisement


PPLOpPNET