from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Evolution resulting from a succession of relatively small genetic variations that often cause the formation of new subspecies.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. small-scale changes in the history of life, such as changes in allele frequencies in a population (over a few generations); also known as change at or below the species level.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. evolution resulting from small specific genetic changes that can lead to a new subspecies
micro- + evolution (Wiktionary)