macroevolution(redirected from macroevolutionary)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Large-scale evolution occurring over a very long period time that results in the formation of new species and higher-level taxonomic groups.
mac′ro·ev′o·lu′tion·ar′y (-shə-nĕr′ē) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
macroevolutionA term of art for large-scale evolution of ecologically separated gene pools, which occurs at or above the level of speciation, resulting in relatively large and complex changes such as anagenesis and cladogenesis stasigenesis.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
macroevolutionthe collective processes by which new species arise and others become extinct.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005