from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A geographic region or area defined by its characteristic life forms.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. any large portion of the Earth's land area which has a generally uniform climate and soil and therefore a high degree of uniformity in the composition of species; a number of different classifications have been proposed by different people
Sorry, no etymologies found.
Forward of the nuclear shuttle, the life zone plus the unpressurized compartment beyond A Deck holding the unmanned probes and the MEM, the Mars Excursion Module, made up the remaining hundred and ten feet of the spacecraft.