from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The lower altitudinal boundary of a snow-covered area, especially of one that is perennially covered, such as the snowcap of a mountain.
- n. The fluctuating latitudinal boundaries around the polar regions marking the extent of snow cover.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The altitude, in a mountainous region, above which the ground is covered with snow, at any particular time.
from the GNU version of the Collaborative International Dictionary of English
- n. lowest limit of perpetual snow. In the Alps this is at an altitude of 9,000 feet, in the Andes, at the equator, 16,000 feet.
from The Century Dictionary and Cyclopedia
- n. The limit of continual snow, or the line above which a mountain is continually covered with snow.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the line on a mountain above which there is perpetual snow and ice
Sorry, no etymologies found.