from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The regions of the universe, especially on the earth, that are capable of supporting life; the biosphere.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The portion of the atmosphere from sea-level to about 4000 meters in which it is possible to breathe without technological assistance.
- n. the biosphere
Sorry, no etymologies found.