ppm
American-
Also PPM, P.P.M., p.p.m. parts per million.
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pulse per minute.
abbreviation
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chem parts per million
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Also: PPM. peak programme meter
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
"One of the decisive criteria for classifying the material as a tektite was its very low water content, as measured by infrared spectroscopy: between 71 and 107 ppm. For comparison, volcanic glasses, such as obsidian, usually contain from 700 ppm to 2% water, whereas tektites are notoriously much drier," Crósta points out.
From Science Daily
By 2024, average levels had fallen to less than 1 ppm.
From Science Daily
More than 80% of soil samples tested in 2022 — seven years after that plant closed — were above the 80 ppm threshold for lead, according to a recent report.
From Los Angeles Times
Soil testing revealed a high lead level of 110 ppm.
From Los Angeles Times
Acceptable lead levels vary by state and the federal limit recently decreased from 400 ppm to 200 ppm because of increasing evidence that lead in any amount is harmful to humans.
From Los Angeles Times
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
