from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Altitude sickness brought on by the diminished oxygen pressure at mountain elevations.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Altitude sickness.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. nausea and shortness of breath experienced by mountain climbers above ten thousand feet
Sorry, no etymologies found.
So short of breath are they that we dared not send them over-mountain, for the mountain sickness would have killed them.