acid precipitation
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noun
meteorological precipitation that is relatively acidic.
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Origin of acid precipitation
First recorded in 1975–80
Words nearby acid precipitation
acidophilus milk, acidosis, acid perfusion test, acid phosphatase, acid-phosphatase test for semen, acid precipitation, acid radical, acid rain, acid reflux, acid-reflux test, acid rock
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
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Scientific definitions for acid precipitation
acid precipitation
Any form of precipitation, including rain, snow, hail, fog, or dew, that is high in acid pollutants, especially sulfuric and nitric acid. Acid precipitation has a pH of less than 5.6 (the normal acidity of unpolluted atmospheric water) and is often less than pH 5.0. Also called acid rain See Note at acid deposition.
The American Heritage® Science Dictionary
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