dichroicadj.

Brit.

/dʌɪˈkrəʊɪk/, U.S.

/daɪˈkroʊɪk/

Origin: A borrowing from Greek, combined with an English element. Etymons: Greek δίχρους , δίχρως , -ic suffix.

Etymology: < either ancient Greek δίχρους (uncontracted δίχροος: see dichroous adj.) or δίχρως two-coloured ( < δι- di- comb. form + χρώς colour < the same base as χρῶμα colour: see chrome n.) + -ic suffix, perhaps after dichroite n. Compare French dichroïque (1833 or earlier), German dichroisch (1838 or earlier). Compare earlier dichromatic adj. 1 and dichroitic adj. Compare also earlier dichroism n.

Science.

Having or exhibiting dichroism (dichroism n.). Also: (of a mirror, filter, etc.) passing or transmitting only light in a certain band of wavelengths.Dichroic filters typically have a special coating to produce the effect, rather than being coloured in the conventional way. dichroic fog n. Photography fog (fog n.² 4) which appears greenish or reddish according to whether it is viewed by reflected or transmitted light respectively.

ΘΚΠ

the world > matter > colour > variegation > [adjective] > two colours

dichroitic1822

dichromatica1830

dichroic1849

dichroous1856

dichromic1860

dichroistic1877

bicolour1889

two-toned1897

twi-coloured1903

two-tone1906

bichrome1929

duotone1934

1849 R. Kane Elements Chem. (ed. 2) xix. 749 This salt is dichroic, being yellow by transmitted, and blue by reflected light.

1878 H. P. Gurney Crystallogr. 112 Tourmaline is strongly dichroic.

1883 Jrnl. & Trans. Photogr. Soc. 30 Mar. 101 When he got to 120° or 130° in heating an emulsion that had been washed and had had ammonia added, there was universal fog not dichroic fog.

1933 S. W. Cole Pract. Physiol. Chem. (ed. 9) i. 19 Bromphenol blue and bromcresol purple are dichroic. That is, the solutions appear red in deep layers and blue or purple in thin layers.

1978 Nature 13 July 116/3 The spectral division is accomplished by a device (a ‘dichroic mirror’) which transmits with minimal loss..the spectral range which it does not reflect.

1988 New Scientist 24 Mar. 43/1 Light from the other portion of the focal plane is split by a dichroic beam splitter.

1991 Pract. Photogr. Jan. 50/2 (advt.) The dichroic filters and integrated light box ensures even illumination.

1999 C. Johnson Pract. Zone Syst. (ed. 3) App. 122 Occasionally a dark, blotchy coating called dichroic fog will appear on the emulsion side of your film and can only be removed by vigorously washing the film by hand.

2007 Collect it! Jan. 24/1 Dichroic glass—that is glass with more than one colour, especially when viewed from different angles or with transmitted or reflected light—is a spin off from the space industry.

This entry has been updated (OED Third Edition, March 2014; most recently modified version published online June 2022).

单词	dichroic
释义	dichroicadj. Brit. /dʌɪˈkrəʊɪk/, U.S. /daɪˈkroʊɪk/ Origin: A borrowing from Greek, combined with an English element. Etymons: Greek δίχρους , δίχρως , -ic suffix. Etymology: < either ancient Greek δίχρους (uncontracted δίχροος: see dichroous adj.) or δίχρως two-coloured ( < δι- di- comb. form + χρώς colour < the same base as χρῶμα colour: see chrome n.) + -ic suffix, perhaps after dichroite n. Compare French dichroïque (1833 or earlier), German dichroisch (1838 or earlier). Compare earlier dichromatic adj. 1 and dichroitic adj. Compare also earlier dichroism n. Science. Having or exhibiting dichroism (dichroism n.). Also: (of a mirror, filter, etc.) passing or transmitting only light in a certain band of wavelengths.Dichroic filters typically have a special coating to produce the effect, rather than being coloured in the conventional way. dichroic fog n. Photography fog (fog n.² 4) which appears greenish or reddish according to whether it is viewed by reflected or transmitted light respectively. ΘΚΠ the world > matter > colour > variegation > [adjective] > two colours dichroitic1822 dichromatica1830 dichroic1849 dichroous1856 dichromic1860 dichroistic1877 bicolour1889 two-toned1897 twi-coloured1903 two-tone1906 bichrome1929 duotone1934 1849 R. Kane Elements Chem. (ed. 2) xix. 749 This salt is dichroic, being yellow by transmitted, and blue by reflected light. 1878 H. P. Gurney Crystallogr. 112 Tourmaline is strongly dichroic. 1883 Jrnl. & Trans. Photogr. Soc. 30 Mar. 101 When he got to 120° or 130° in heating an emulsion that had been washed and had had ammonia added, there was universal fog not dichroic fog. 1933 S. W. Cole Pract. Physiol. Chem. (ed. 9) i. 19 Bromphenol blue and bromcresol purple are dichroic. That is, the solutions appear red in deep layers and blue or purple in thin layers. 1978 Nature 13 July 116/3 The spectral division is accomplished by a device (a ‘dichroic mirror’) which transmits with minimal loss..the spectral range which it does not reflect. 1988 New Scientist 24 Mar. 43/1 Light from the other portion of the focal plane is split by a dichroic beam splitter. 1991 Pract. Photogr. Jan. 50/2 (advt.) The dichroic filters and integrated light box ensures even illumination. 1999 C. Johnson Pract. Zone Syst. (ed. 3) App. 122 Occasionally a dark, blotchy coating called dichroic fog will appear on the emulsion side of your film and can only be removed by vigorously washing the film by hand. 2007 Collect it! Jan. 24/1 Dichroic glass—that is glass with more than one colour, especially when viewed from different angles or with transmitted or reflected light—is a spin off from the space industry. This entry has been updated (OED Third Edition, March 2014; most recently modified version published online June 2022). < adj.1849
随便看	hand organ hand organist hand out hand over hand over fist hand over hand hand over head hand pass in one's dinner pail hand pass on the torch hand phone hand piercer hand pin hand plant hand plate hand press hand pressman handletter handlettered handlifting handlight handlike handline handliner handlines handling