acid rain
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English
Etymology
Coined in 1872 by Scottish chemist Robert Angus Smith.
Pronunciation
Noun
acid rain (countable and uncountable, plural acid rains)
- Rain which is unusually acidic (pH of less than the natural range of 5 to 6); caused mainly by atmospheric pollution with sulphur dioxide, carbon dioxide and nitrogen compounds.
- Hypernym: acid precipitation
- 1987 January 20, “Airborne Pollutants”, in The New York Times, →ISSN:
- Acid rain forms when water in the atmosphere condenses on particles containing acid-forming pollutants, such as sulfate produced by the burning of fossil fuels and nitrogen oxides from automobile exhausts.
Translations
unusually acidic rain
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