microevolutionn.

Brit.

/ˌmʌɪkrəʊˌiːvəˈl(j)uːʃn/,

/ˌmʌɪkrəʊˌɛvəˈl(j)uːʃn/, U.S.

/ˈˌmaɪkroʊˌɛvəˈluʃ(ə)n/

Origin: Formed within English, by compounding. Etymons: micro- comb. form, evolution n.

Etymology: < micro- comb. form + evolution n. Compare French microévolution (J. Rostand, 1932).

Biology.

Evolutionary change on a small scale or over a relatively short time period; spec. that resulting from small mutations within a species.

ΘΚΠ

the world > life > biology > biological processes > evolution > [noun] > processes or types of evolution

transmutation1626

substitution1822

subspeciation1826

metamorphosis1835

phytogenesis1847

phytogeny1850

anamorphosis1852

correlation1859

advergence1861

convergence1861

phylogeny1869

ontogeny1872

recapitulation1874

ontogenesis1875

phylogenesis1875

biogenesis1876

abiogenesis1884

anagenesis1889

tachygenesis1893

orthogenesis1895

adaptive radiation1898

speciation1906

microevolution1911

subspeciation1921

raciation1934

orthogenetics1937

encephalization1938

proterogenesis1938

allomorphosis1941

cladogenesis1953

Wallace effect1966

metachromism1968

punctuation1976

speciational evolution1988

tachygen-

1911 Amer. Naturalist 45 256 For, granting the facts of mutation, we have only accounted for a micro-evolution.

1937 T. Dobzhansky Genetics & Origin of Species i. 12 For this reason we are compelled at the present level of knowledge reluctantly to put a sign of equality between the mechanisms of macro- and micro-evolution.

1938 Amer. Midland Naturalist 19 507 Numerous notable pairs of species, telling the same story of divergent micro-evolution, could be listed among shrubs and herbaceous plants.

1940 R. Goldschmidt Material Basis Evol. 199 Microevolution by means of micromutation leads only to diversification within the species.

1963 P. H. Davis & V. H. Heywood Princ. Angiosperm Taxon. ii. 72 They [sc. biosystematists] have gone a long way in elucidating the processes of evolution at and below the species level (micro-evolution).

1974 T. Heyerdahl Fatu-Hiva ii. 86 I was on constant look-out for animals to save in bottles and tubes for the study of trans-oceanic migration and micro-evolution.

1983 Man 18 ii. 407/2 Thus microevolution, the slow accumulation of small changes within species, is not necessarily linked to or the cause of macroevolution.

1996 Ecology 77 2382 Dormant propagule pools may store potentially significant genetic variation that can influence the rate and direction of microevolution via directional selection.

This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).

单词	microevolution
释义	microevolutionn. Brit. /ˌmʌɪkrəʊˌiːvəˈl(j)uːʃn/, /ˌmʌɪkrəʊˌɛvəˈl(j)uːʃn/, U.S. /ˈˌmaɪkroʊˌɛvəˈluʃ(ə)n/ Origin: Formed within English, by compounding. Etymons: micro- comb. form, evolution n. Etymology: < micro- comb. form + evolution n. Compare French microévolution (J. Rostand, 1932). Biology. Evolutionary change on a small scale or over a relatively short time period; spec. that resulting from small mutations within a species. ΘΚΠ the world > life > biology > biological processes > evolution > [noun] > processes or types of evolution transmutation1626 substitution1822 subspeciation1826 metamorphosis1835 phytogenesis1847 phytogeny1850 anamorphosis1852 correlation1859 advergence1861 convergence1861 phylogeny1869 ontogeny1872 recapitulation1874 ontogenesis1875 phylogenesis1875 biogenesis1876 abiogenesis1884 anagenesis1889 tachygenesis1893 orthogenesis1895 adaptive radiation1898 speciation1906 microevolution1911 subspeciation1921 raciation1934 orthogenetics1937 encephalization1938 proterogenesis1938 allomorphosis1941 cladogenesis1953 Wallace effect1966 metachromism1968 punctuation1976 speciational evolution1988 tachygen- 1911 Amer. Naturalist 45 256 For, granting the facts of mutation, we have only accounted for a micro-evolution. 1937 T. Dobzhansky Genetics & Origin of Species i. 12 For this reason we are compelled at the present level of knowledge reluctantly to put a sign of equality between the mechanisms of macro- and micro-evolution. 1938 Amer. Midland Naturalist 19 507 Numerous notable pairs of species, telling the same story of divergent micro-evolution, could be listed among shrubs and herbaceous plants. 1940 R. Goldschmidt Material Basis Evol. 199 Microevolution by means of micromutation leads only to diversification within the species. 1963 P. H. Davis & V. H. Heywood Princ. Angiosperm Taxon. ii. 72 They [sc. biosystematists] have gone a long way in elucidating the processes of evolution at and below the species level (micro-evolution). 1974 T. Heyerdahl Fatu-Hiva ii. 86 I was on constant look-out for animals to save in bottles and tubes for the study of trans-oceanic migration and micro-evolution. 1983 Man 18 ii. 407/2 Thus microevolution, the slow accumulation of small changes within species, is not necessarily linked to or the cause of macroevolution. 1996 Ecology 77 2382 Dormant propagule pools may store potentially significant genetic variation that can influence the rate and direction of microevolution via directional selection. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). < n.1911
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