Ppm


1.
Also, PPM, P.P.M. p.p.m. parts per million.
2.
pulse per minute.
abbreviation
1.
(chem) parts per million
2.
Also PPM. peak programme meter
noun

See part per million

abbreviation of parts per million, attested by 1913.

ppm abbr.
parts per million

Portable Pixmap
1.
page per minute
2.
parts per million

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