from The American Heritage® Dictionary of the English Language, 4th Edition
- n. See ozone layer.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A layer in part of the stratosphere that has a larger than normal concentration of ozone; the ozone layer
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun
Sorry, no etymologies found.