acid precipitation
noun
meteorological precipitation that is relatively acidic.
Origin of acid precipitation
1First recorded in 1975–80
- Compare acid rain.
Words Nearby acid precipitation
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
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.
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