n.
Evolution resulting from a succession of relatively small genetic variations that often cause the formation of new subspecies.
microevolutionary mi'cro·ev'o·lu'tion·ar'y adj.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
