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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 ?
Given that scientists have observed micro-evolution of this sort in nonhuman species within the lifetimes of individual researchers, and given the ample evidence from animal husbandry that both physical and behavioral traits can be altered in relatively short spans of time, these human evolutionary discoveries should not be surprising.
Creationists will often tell you they have no problem with "micro-evolution" only with "macro-evolution" But when you step back and take the long view of the results, micro-evolution is seen to be the trees, macro-evolution the forest.
Nobody doubts that micro-evolution is observed, but observing micro--evolution is not proof that macro-evolution is a fact.

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