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 (mī′krō-ĕv′ə-lo͞o′shən, -ē′və-)
Small-scale evolution consisting of genetic changes occurring usually within a single species and over a shorter period of time than in macroevolution.

mi′cro·ev′o·lu′tion·ar′y adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Biology) evolutionary change over a short period
2. (Biology) evolutionary change on a small scale
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌmaɪ kroʊˌɛv əˈlu ʃən; esp. Brit. -ˌi və-)

evolutionary change involving the gradual accumulation of mutations leading to new varieties within a species.
mi`cro•ev`o•lu′tion•ar′y, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.microevolution - evolution resulting from small specific genetic changes that can lead to a new subspecies
organic evolution, phylogenesis, phylogeny, evolution - (biology) the sequence of events involved in the evolutionary development of a species or taxonomic group of organisms
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Microevolution toward reduced host affinity of MERS-CoV might be associated with host antibody responses.
Genome microevolution of chikungunya viruses causing the Indian Ocean outbreak.
However, understanding the complete impact of climate change-induced coat colour mismatch on hare demography requires a detailed understanding of the potential for phenotypic plasticity or microevolution in the phenology of coat colour moults in the species.
It can also improve our understanding of microevolution through a better understanding of natural selection, mutation, and recombination, as summarized in S.
Meanwhile the role of microevolution on bringing about new NTM species cannot be overruled.
Combining field epidemiological information and genetic data to comprehensively reconstruct the invasion history and the microevolution of the sudden oak death agent Phytophthora ramorum (Stramenopila: Oomycetes) in California.
Although he agrees with the power of natural selection to drive microevolution (evolution occurring within the boundaries of a species), his argument is that it is insufficient to account for macroevolution (evolution that jumps boundaries, leading to novel clades and species).
Kato-Maeda et al., "Use of Whole Genome Sequencing to Determine the Microevolution of Mycobacterium tuberculosis during an Outbreak," PLoS ONE, vol.
Microevolution in lower Central America: genetic characterization of the Chibcha-speaking groups of Costa Rica and Panama, and a consensus taxonomy based on genetic and linguistic affinity.
From his beginnings as a scientist, he was interested in the microevolution of American indigenous populations that developed independently during 16,000 years until the arrival of the European, who introduced irreversible changes in the genetic and cultural geography.