raciationn.
/ˌreɪsɪˈeɪʃn/, U.S. /ˌreɪsiˈeɪʃ(ə)n/ Biology and Physical Anthropology.
The evolutionary development of distinguishable biological races (race n.6 5).
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-
1934 Amer. Naturalist 68 121 A splendid example of parallel raciation was found by..statistically comparing the several species of lantern fishes in the Mediterranean and the Atlantic.
1968 M. Harris Rise Anthropol. Theory (1969) iv. 84 Full-fledged scientific racial determinism could not flourish as long as raciation was conceived in terms of the rapid acquisition of new hereditary characteristics.
1971 Nature 28 May 250/1 This approach to microsystematics has been of particular value in the study of raciation..in commercially important marine fishes.
2001 Molecular Ecol. 10 613 Raciation of house mice appears to have happened on numerous occasions within the central Alps.
This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022).
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n.1934