from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Large-scale evolution occurring over geologic time that results in the formation of new taxonomic groups.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Large-scale patterns or processes in the history of life, including the origins of novel organism designs, evolutionary trends, adaptive radiations and extinctions.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. evolution on a large scale extending over geologic era and resulting in the formation of new taxonomic groups
macro- + evolution (Wiktionary)