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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.


1. (Biology) evolutionary change over a short period
2. (Biology) evolutionary change on a small scale


(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.
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
References in periodicals archive ?
Genome microevolution of chikungunya viruses causing the Indian Ocean outbreak.
Microevolution of African American Dental Morphology.
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.
Macro and microevolution are fundamentally the same thing.
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.
rubrum DNA strain type switches observed in ongoing infections among all treatment groups could be attributed to microevolution or coinfections of DNA strains," the researchers noted.
Objective: Evolutionary biologists have long sought to understand the relationship between microevolution (processes within species), as observed in nature and the laboratory, and macroevolution (processes at and above the species), which occurs over intervals that far exceed a human lifespan.
It appears that the extensive marginal areas of Sucre municipality, such as Union, are regions with that have had a persistent, long-term tuberculosis presence resulting in the microevolution of their own family of strains, especially SIT42, that are not found in other regions, not even in the large marginal regions of western Caracas.
Microevolution between paired antral and paired antrum and corpus Helicobacter pylori isolates recovered from individual patients.
Presenting their scientific case, they locate the center of the controversy on a dichotomy between macro- and microevolution (p.