Definition of ppm in English:

ppm

Line breaks: ppm

abbreviation

1Part(s) per million: water containing 1 ppm fluoride
1.1 Computing Page(s) per minute, a measure of the speed of printers.

Definition of ppm in:

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Word of the day neoteny
Pronunciation: niːˈɒt(ə)ni
noun
retention of juvenile features in the adult animal