from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The theory that speciation occurs in spurts of major genetic alterations that punctuate long periods of little change.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A theory of evolution holding that evolutionary change tends to be characterized by long periods of stability, or equilibrium, punctuated by episodes of very fast development.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a theory of evolution holding that evolutionary change in the fossil record came in fits and starts rather than in a steady process of slow change
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