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.
At 250 ppm, the improvement reached 38 percent.
From Science Daily • Apr. 18, 2026
For ants exposed to 25 ppm of caffeine, foraging time decreased by 28 percent with each visit.
From Science Daily • Apr. 18, 2026
The residents wanted to grow food, he said, but the soil had lead levels around 112 ppm, well over the state limit.
From Los Angeles Times • Apr. 24, 2025
By contrast, the earlier Eocene, when C02 reached 1000 ppm and the global mean temperatures were 13º C warmer than today, could represent the worst case scenario.
From Salon • Feb. 17, 2025
Turbidity is consistently more than 100 ppm in the lower portions of the mainstream and major tributaries, but is usually lower in the upper portions of tributaries.
From Fishes of the Wakarusa River in Kansas by Deacon, James E.
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.
