polychroismn.

Brit.

/ˌpɒlɪˈkrəʊɪz(ə)m/, U.S.

/ˌpɑliˈkroʊˌɪz(ə)m/

Origin: A borrowing from Greek, combined with an English element. Etymons: Greek πολύχροος , πολύχρους , -ism suffix.

Etymology: < ancient Greek πολύχροος (contracted to πολύχρους) many-coloured ( < πολυ- poly- comb. form + χρώς colour: see chrome n.) + -ism suffix. Compare French polychroïsme (1842). Compare earlier dichroism n., trichroism n., pleochroism n.

Crystallography and Mineralogy. Now rare.

= pleochroism n.

ΘΚΠ

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

pleochroism1854

polychroism1855

pleochromatism1864

1855 J. D. Dana Man. Mineral. (ed. 7) ii. 57 Different colors are observed only in crystals with unequal axes... This is the general principle at the basis of polychroism.

1861 Philos. Trans. 1860 (Royal Soc.) 150 428 In polarized light one of the most beautiful examples of polychroism is observed.., the colour passing..from a pure yellow to a deep red.

1923 Science 9 Nov. 375/1 The polychroism is evident beneath a certain depth, and the tint varies a little.

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

单词	polychroism
释义	polychroismn. Brit. /ˌpɒlɪˈkrəʊɪz(ə)m/, U.S. /ˌpɑliˈkroʊˌɪz(ə)m/ Origin: A borrowing from Greek, combined with an English element. Etymons: Greek πολύχροος , πολύχρους , -ism suffix. Etymology: < ancient Greek πολύχροος (contracted to πολύχρους) many-coloured ( < πολυ- poly- comb. form + χρώς colour: see chrome n.) + -ism suffix. Compare French polychroïsme (1842). Compare earlier dichroism n., trichroism n., pleochroism n. Crystallography and Mineralogy. Now rare. = pleochroism n. ΘΚΠ the world > matter > colour > variegation > iridescence > [noun] > pleochroism pleochroism1854 polychroism1855 pleochromatism1864 1855 J. D. Dana Man. Mineral. (ed. 7) ii. 57 Different colors are observed only in crystals with unequal axes... This is the general principle at the basis of polychroism. 1861 Philos. Trans. 1860 (Royal Soc.) 150 428 In polarized light one of the most beautiful examples of polychroism is observed.., the colour passing..from a pure yellow to a deep red. 1923 Science 9 Nov. 375/1 The polychroism is evident beneath a certain depth, and the tint varies a little. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < n.1855
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