acid precipitation

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noun

meteorological precipitation that is relatively acidic.

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Compare acid rain.

Origin of acid precipitation

First recorded in 1975–80

Words nearby acid precipitation

acidometer, acidophil, acidophilic, acidophilus milk, acidosis, acid precipitation, acid radical, acid rain, acid reflux, acid rock, acid salt

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.