Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Acid precipitation falling as rain.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Rain which is unusually
acidic (pH of less than the natural range of 5 to 6); caused mainly byatmospheric pollution withsulphur dioxide andnitrogen compounds .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water
Etymologies
Sorry, no etymologies found.
Support
![](/assets/logo-heart.png)
Help support Wordnik (and make this page ad-free) by adopting the word acid rain.
Examples
Sorry, no example sentences found.
hernesheir commented on the word acid rain
The name of a hot pepper sauce.
September 22, 2009