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.
For ants exposed to 25 ppm of caffeine, foraging time decreased by 28 percent with each visit.
From Science Daily ● Apr. 18, 2026
"We saw that the shirts we tested were all over the allowed limit for lead of 100 ppm," says Espinoza.
From Science Daily ● Apr. 2, 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
But other burned homes in the same communities had lead levels far lower, between 23 and 40 ppm.
From Los Angeles Times ● Apr. 24, 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 James E. Deacon
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