Plural: acid precipitations
Precipitation (as rain or snow) having increased acidity caused by environmental factors (as atmospheric pollutants).
Rain containing acids that form in the atmosphere when industrial gas emissions (especially sulphur dioxide and nitrogen oxides) combine with water
acidize · acidly · acidness · acidophil · acidophilic · acidophilous · acidosis · acid precipitation · acid rain · acid-rock · acid test · acidulate · acidulation · acidulent · acidulently