metachromismn.

Brit.

/ˌmɛtəˈkrəʊmɪz(ə)m/, U.S.

/ˌmɛdəˈkroʊˌmɪz(ə)m/

Origin: Formed within English, by derivation. Etymons: meta- prefix, -chromism comb. form.

Etymology: < meta- prefix + -chromism comb. form. Compare metachromatism n.

†1. Chemistry. Change of the colour of a substance by heating. (In quots. apparently an alteration of metachromatism, the term used by William Ackroyd: see metachromatism n. 1a) Obsolete.

ΘΚΠ

the world > matter > colour > change of colour > [noun]

discoloura1398

discolouring?a1425

discolouration1545

discolouredness1585

transcoloration1664

discolourment1762

discolorization1827

metachromatism1876

metachromism1876

metachrosis1887

tinctumutation1895

electrochromism1961

the world > life > biology > biological processes > development, growth, or degeneration > [noun] > change of colour

metachromatism1876

metachromism1876

metachrosis1887

1876 Chem. News 11 Feb. 60/2 Metachromism, as he [sc. W. Ackroyd] terms the changes of colour which various substances undergo when heated.

1876 Galaxy July 133/2 It is evident that metachromism is nearly related to allotropism, a body expanding through the influence of heat presenting a continuous series of allotropes.

2. Zoology. A sequence of evolutionary change in mammalian coat colour, consisting of loss of agouti patterning and reduction in pigmentation.

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-

1968 P. Hershkovitz in Evolution 22 558/1 The principle of saturation, bleaching, and elimination of integumental pigments in the same direction and along similar and irreversible pathways in mammals is here termed metachromism.

1970 Q. Rev. Biol. 45 21/2 The principle of metachromism or evolutionary change in mammalian integumentary colors. He [sc. Hershkovitz] believes that..as predation pressures have decreased, coloration has become less protective and more attractive.

1988 Proc. Acad. Nat. Sci. Philadelphia 140 i. 240 The guide for and measure of evolutionary change of mammalian tegumentary coloration is described as metachromism.

1995 Systematic Biol. 44 515 Metachromism is a theory of variation in mammalian coat color that predicts an orthogenetic evolutionary pattern.

2000 New Scientist 5 Feb. 32/1 Metachromism would probably have faded into obscurity had it been proposed by some minor figure.

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

单词	metachromism
释义	metachromismn. Brit. /ˌmɛtəˈkrəʊmɪz(ə)m/, U.S. /ˌmɛdəˈkroʊˌmɪz(ə)m/ Origin: Formed within English, by derivation. Etymons: meta- prefix, -chromism comb. form. Etymology: < meta- prefix + -chromism comb. form. Compare metachromatism n. †1. Chemistry. Change of the colour of a substance by heating. (In quots. apparently an alteration of metachromatism, the term used by William Ackroyd: see metachromatism n. 1a) Obsolete. ΘΚΠ the world > matter > colour > change of colour > [noun] discoloura1398 discolouring?a1425 discolouration1545 discolouredness1585 transcoloration1664 discolourment1762 discolorization1827 metachromatism1876 metachromism1876 metachrosis1887 tinctumutation1895 electrochromism1961 the world > life > biology > biological processes > development, growth, or degeneration > [noun] > change of colour metachromatism1876 metachromism1876 metachrosis1887 1876 Chem. News 11 Feb. 60/2 Metachromism, as he [sc. W. Ackroyd] terms the changes of colour which various substances undergo when heated. 1876 Galaxy July 133/2 It is evident that metachromism is nearly related to allotropism, a body expanding through the influence of heat presenting a continuous series of allotropes. 2. Zoology. A sequence of evolutionary change in mammalian coat colour, consisting of loss of agouti patterning and reduction in pigmentation. 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- 1968 P. Hershkovitz in Evolution 22 558/1 The principle of saturation, bleaching, and elimination of integumental pigments in the same direction and along similar and irreversible pathways in mammals is here termed metachromism. 1970 Q. Rev. Biol. 45 21/2 The principle of metachromism or evolutionary change in mammalian integumentary colors. He [sc. Hershkovitz] believes that..as predation pressures have decreased, coloration has become less protective and more attractive. 1988 Proc. Acad. Nat. Sci. Philadelphia 140 i. 240 The guide for and measure of evolutionary change of mammalian tegumentary coloration is described as metachromism. 1995 Systematic Biol. 44 515 Metachromism is a theory of variation in mammalian coat color that predicts an orthogenetic evolutionary pattern. 2000 New Scientist 5 Feb. 32/1 Metachromism would probably have faded into obscurity had it been proposed by some minor figure. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). < n.1876
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