metamerismn.¹

Brit.

/mᵻˈtamərɪz(ə)m/,

/mɛˈtamərɪz(ə)m/, U.S.

/məˈtæməˌrɪz(ə)m/

Origin: Formed within English, by derivation. Etymons: metameric adj.¹, -ism suffix.

Etymology: < metamer- (in metameric adj.¹) + -ism suffix. With sense 1 compare German Metamerie (Berzelius 1833, in Jahres-Bericht über die Fortschritte der physischen Wissensch. 12 65), French métamérie (1860). Compare also isomerism n. and polymerism n.¹

1. Chemistry. The state, condition, or fact of being metameric (metameric adj.¹ 1). Now rare.

ΘΚΠ

the world > matter > chemistry > isomerism > [noun] > structural isomerism > functional group isomerism

metamerism1833

1833 Rep. 1st & 2nd Meetings Brit. Assoc. Advancem. Sci. 1831–2 435 (heading) Polymerism and metamerism.

1848 H. Watts tr. L. Gmelin Hand-bk. Chem. I. 110 Metamerism. This term is applied by Berzelius to the case in which the compound atoms of two chemical compounds containing the same elementary atoms, and for the most part in the same proportions, are nevertheless made up of different proximate elements.

1850 C. G. B. Daubeny Introd. Atomic Theory (ed. 2) viii. 265 In the former case, the determining cause would seem to be the degree of aggregation; in the latter the arrangement of the particles with reference to each other. The former case Berzelius has distinguished by the term polymerism; the latter, by that of metamerism.

1865 Jrnl. Chem. Soc. 18 239 (note) His object is rather to prove the metamerism than to explain the isomerism of these bodies.

1904 C. S. Palmer & R. A. Lehfeldt tr. W. Nernst Theoret. Chem. (ed. 2) ii. iv. 275 There are substances with physical and chemical properties clearly distinct, and these are found especially in the carbon compounds which have both the same per cent composition and the same molecular weight (isomerism in the special sense of metamerism).

1946 Thorpe's Dict. Appl. Chem. (ed. 4) VII. 67/1 Metamerism became associated with the relationship between compounds of the same type which differ only in the alkyl groups they contain, such as butylamine, methylpropylamine, and dimethylamine, and has now fallen into disuse.

2. Optics. The phenomenon in which two stimuli (esp. colours) that differ in physical properties are perceived to be identical. Also: the phenomenon in which two colours that are matched under a particular set of conditions become different from one another when one parameter (esp. the illumination) is changed.

ΚΠ

1931–3 J. S. Taylor tr. W. Ostwald Colour Sci. II. v. 36 A related White is only possible when there is complete remission of all incident rays, and there is, in this case, no opening for Metamerism.

1958 Jrnl. Optical Soc. Amer. 48 451 Practical investigations of the effects of metamerism require the study of a large number of colors which are metameric with respect to a given light source and a set of color–mixture functions.

1970 Jrnl. Photogr. Sci. 18 205 Spectral colour reproduction..provides a useful basis for determining the degree of metamerism of reproduction systems.

1983 Color Res. & Applic. 8 47/1 Both the new and the optimized deviate observer give a basis for the further study of the evaluation of observer metamerism.

1995 Which? Aug. 25/2 A phenomenon called ‘metamerism’ can make two colours that look the same under one type of light appear different under another type of light.

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

metamerismn.²

Brit.

/mᵻˈtamərɪz(ə)m/,

/mɛˈtamərɪz(ə)m/, U.S.

/məˈtæməˌrɪz(ə)m/

Origin: Formed within English, by derivation. Etymons: metameric adj.², -ism suffix.

Etymology: < metamer- (in metameric adj.²) + -ism suffix.

Zoology and Botany.

Segmentation of the body (or part of the body) of an animal or plant into similar, discrete units (metameres, metamers, or somites); construction of the body from such units. Also: an instance of this (rare).In animals, metamerism is most clearly seen in invertebrates such as the earthworm, where the segmentation is visible externally. In vertebrates it is seen most clearly in the embryonic development of the spine, spinal nerves, and associated muscles.

ΘΚΠ

the world > animals > animal body > general parts > [noun] > regions comprising segments > consisting of segments

metamerism1877

metamerization1880

metamery1887

vertebration1888

1877 Q. Jrnl. Microsc. Sci. 17 427 This latter..breaks up into four circlets by development of cross-pieces in correspondence with a metamerism.

1925 A. D. Imms Gen. Textbk. Entomol. 179 In the protopod phase metamerism is incomplete, the abdomen being imperfectly differentiated.

1960 D. C. Braungart & R. Buddeke Introd. Animal Biol. (ed. 5) xvi. 225 Metamerism is shown by all members of the group [sc. the vertebrates] in the make-up of the vertebral column and in the arrangement of muscles and nerves associated with it.

1989 S. J. Gould Wonderful Life (1991) 103 The basic principle of arthropod design is metamerism, the construction of the body from an extended series of repeated segments.

2000 Current Topics Developmental Biol. 48 1 In the evolution of metamerism in vertebrates, the first skeletal elements were primitive parts of neural arches.

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

单词	metamerism
释义	metamerismn.¹ Brit. /mᵻˈtamərɪz(ə)m/, /mɛˈtamərɪz(ə)m/, U.S. /məˈtæməˌrɪz(ə)m/ Origin: Formed within English, by derivation. Etymons: metameric adj.¹, -ism suffix. Etymology: < metamer- (in metameric adj.¹) + -ism suffix. With sense 1 compare German Metamerie (Berzelius 1833, in Jahres-Bericht über die Fortschritte der physischen Wissensch. 12 65), French métamérie (1860). Compare also isomerism n. and polymerism n.¹ 1. Chemistry. The state, condition, or fact of being metameric (metameric adj.¹ 1). Now rare. ΘΚΠ the world > matter > chemistry > isomerism > [noun] > structural isomerism > functional group isomerism metamerism1833 1833 Rep. 1st & 2nd Meetings Brit. Assoc. Advancem. Sci. 1831–2 435 (heading) Polymerism and metamerism. 1848 H. Watts tr. L. Gmelin Hand-bk. Chem. I. 110 Metamerism. This term is applied by Berzelius to the case in which the compound atoms of two chemical compounds containing the same elementary atoms, and for the most part in the same proportions, are nevertheless made up of different proximate elements. 1850 C. G. B. Daubeny Introd. Atomic Theory (ed. 2) viii. 265 In the former case, the determining cause would seem to be the degree of aggregation; in the latter the arrangement of the particles with reference to each other. The former case Berzelius has distinguished by the term polymerism; the latter, by that of metamerism. 1865 Jrnl. Chem. Soc. 18 239 (note) His object is rather to prove the metamerism than to explain the isomerism of these bodies. 1904 C. S. Palmer & R. A. Lehfeldt tr. W. Nernst Theoret. Chem. (ed. 2) ii. iv. 275 There are substances with physical and chemical properties clearly distinct, and these are found especially in the carbon compounds which have both the same per cent composition and the same molecular weight (isomerism in the special sense of metamerism). 1946 Thorpe's Dict. Appl. Chem. (ed. 4) VII. 67/1 Metamerism became associated with the relationship between compounds of the same type which differ only in the alkyl groups they contain, such as butylamine, methylpropylamine, and dimethylamine, and has now fallen into disuse. 2. Optics. The phenomenon in which two stimuli (esp. colours) that differ in physical properties are perceived to be identical. Also: the phenomenon in which two colours that are matched under a particular set of conditions become different from one another when one parameter (esp. the illumination) is changed. ΚΠ 1931–3 J. S. Taylor tr. W. Ostwald Colour Sci. II. v. 36 A related White is only possible when there is complete remission of all incident rays, and there is, in this case, no opening for Metamerism. 1958 Jrnl. Optical Soc. Amer. 48 451 Practical investigations of the effects of metamerism require the study of a large number of colors which are metameric with respect to a given light source and a set of color–mixture functions. 1970 Jrnl. Photogr. Sci. 18 205 Spectral colour reproduction..provides a useful basis for determining the degree of metamerism of reproduction systems. 1983 Color Res. & Applic. 8 47/1 Both the new and the optimized deviate observer give a basis for the further study of the evaluation of observer metamerism. 1995 Which? Aug. 25/2 A phenomenon called ‘metamerism’ can make two colours that look the same under one type of light appear different under another type of light. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). metamerismn.² Brit. /mᵻˈtamərɪz(ə)m/, /mɛˈtamərɪz(ə)m/, U.S. /məˈtæməˌrɪz(ə)m/ Origin: Formed within English, by derivation. Etymons: metameric adj.², -ism suffix. Etymology: < metamer- (in metameric adj.²) + -ism suffix. Zoology and Botany. Segmentation of the body (or part of the body) of an animal or plant into similar, discrete units (metameres, metamers, or somites); construction of the body from such units. Also: an instance of this (rare).In animals, metamerism is most clearly seen in invertebrates such as the earthworm, where the segmentation is visible externally. In vertebrates it is seen most clearly in the embryonic development of the spine, spinal nerves, and associated muscles. ΘΚΠ the world > animals > animal body > general parts > [noun] > regions comprising segments > consisting of segments metamerism1877 metamerization1880 metamery1887 vertebration1888 1877 Q. Jrnl. Microsc. Sci. 17 427 This latter..breaks up into four circlets by development of cross-pieces in correspondence with a metamerism. 1925 A. D. Imms Gen. Textbk. Entomol. 179 In the protopod phase metamerism is incomplete, the abdomen being imperfectly differentiated. 1960 D. C. Braungart & R. Buddeke Introd. Animal Biol. (ed. 5) xvi. 225 Metamerism is shown by all members of the group [sc. the vertebrates] in the make-up of the vertebral column and in the arrangement of muscles and nerves associated with it. 1989 S. J. Gould Wonderful Life (1991) 103 The basic principle of arthropod design is metamerism, the construction of the body from an extended series of repeated segments. 2000 Current Topics Developmental Biol. 48 1 In the evolution of metamerism in vertebrates, the first skeletal elements were primitive parts of neural arches. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). < n.¹1833n.²1877
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metamerismn.1

metamerismn.2

metamerismn.¹

metamerismn.²