from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The number and variety of organisms found within a specified geographic region.
- n. The variability among living organisms on the earth, including the variability within and between species and within and between ecosystems.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. the diversity (number and variety of species) of plant and animal life within a region
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the diversity of plant and animal life in a particular habitat (or in the world as a whole)
From bio- + diversity. (Wiktionary)