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ppm

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WordReference Random House Unabridged Dictionary of American English © 2025

ppm,

Weights and Measuresparts per million.
pulse per minute.

p.p.m.,

Weights and Measuresparts per million.

Also, P.P.M., ppm, PPM

Collins Concise English Dictionary © HarperCollins Publishers::

ppm

parts per million
Also: PPM peak programme meter

Collins Concise English Dictionary © HarperCollins Publishers::

PPM permanent pacemaker

Forum discussions with the word(s) "ppm" in the title:

lb, MT, ppm, mpa.s
ppm rate

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