pleochroismn.

Brit.

/ˌplɪəˈkrəʊɪz(ə)m/, U.S.

/ˌpliəˈkroʊˌɪz(ə)m/

Origin: A borrowing from Greek, combined with English elements; probably modelled on a German lexical item. Etymons: pleo- comb. form, Greek χρώς , -ism suffix.

Etymology: < pleo- comb. form + ancient Greek χρώς colour ( < the same base as χρῶμα colour: see chrome n.) + -ism suffix, probably after German Pleochroismus (W. Haidinger 1845, in Annalen der Physik 65 1). Compare French pléochroïsme (1847 or earlier). Compare earlier dichroism n., trichroism n., and slightly later polychroism n.

Crystallography and Mineralogy.

The property of a crystal of absorbing different wavelengths of transmitted light differently depending on their direction of incidence or state of polarization, and thus to show different colours in different directions; the phenomenon of dichroism and trichroism. Also: an instance of this.

ΘΚΠ

the world > matter > colour > variegation > iridescence > [noun] > pleochroism

pleochroism1854

polychroism1855

pleochromatism1864

1854 J. D. Dana Syst. Mineral. (ed. 4) 166 Some crystals, viewed by transmitted light, present different colors in different directions. This property is termed pleochroism.

1886 Builder 24 Apr. Dichroism, or pleochroism, practically never occurs in crystals belonging to the cubic system.

1930 B. N. Peach & J. Horne Chapters Geol. Scotl. 54 A pleochroism ranging from yellow-green to deep-green.

1964 H. Hodges Artifacts xvii. 192 Some minerals viewed in polarized light will show a diagnostic colour, or pleochroism.

1997 Oxoniensia 61 179 The mineral shows vivid-blue/lilac-rose/colourless pleochroism.

This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).

单词	pleochroism
释义	pleochroismn. Brit. /ˌplɪəˈkrəʊɪz(ə)m/, U.S. /ˌpliəˈkroʊˌɪz(ə)m/ Origin: A borrowing from Greek, combined with English elements; probably modelled on a German lexical item. Etymons: pleo- comb. form, Greek χρώς , -ism suffix. Etymology: < pleo- comb. form + ancient Greek χρώς colour ( < the same base as χρῶμα colour: see chrome n.) + -ism suffix, probably after German Pleochroismus (W. Haidinger 1845, in Annalen der Physik 65 1). Compare French pléochroïsme (1847 or earlier). Compare earlier dichroism n., trichroism n., and slightly later polychroism n. Crystallography and Mineralogy. The property of a crystal of absorbing different wavelengths of transmitted light differently depending on their direction of incidence or state of polarization, and thus to show different colours in different directions; the phenomenon of dichroism and trichroism. Also: an instance of this. ΘΚΠ the world > matter > colour > variegation > iridescence > [noun] > pleochroism pleochroism1854 polychroism1855 pleochromatism1864 1854 J. D. Dana Syst. Mineral. (ed. 4) 166 Some crystals, viewed by transmitted light, present different colors in different directions. This property is termed pleochroism. 1886 Builder 24 Apr. Dichroism, or pleochroism, practically never occurs in crystals belonging to the cubic system. 1930 B. N. Peach & J. Horne Chapters Geol. Scotl. 54 A pleochroism ranging from yellow-green to deep-green. 1964 H. Hodges Artifacts xvii. 192 Some minerals viewed in polarized light will show a diagnostic colour, or pleochroism. 1997 Oxoniensia 61 179 The mineral shows vivid-blue/lilac-rose/colourless pleochroism. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < n.1854
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