dichromatn.

Brit.

/ˈdʌɪkrə(ʊ)mat/, U.S.

/ˈdaɪkrəˌmæt/,

/ˈdaɪkroʊˌmæt/

Forms: 1800s– dichromat, 1800s– dichromate.

Origin: A borrowing from German. Etymon: German Dichromat.

Etymology: < German Dichromat (1892 or earlier), back-formation < dichromatisch dichromatic adj., with reinterpretation of -at- as a reflex of classical Latin -ātus -ate suffix¹. Compare earlier dichromatic n. Compare also monochromat n. and trichromat n.With form dichromate compare -ate suffix¹.

Ophthalmology and Physiology.

A person or animal exhibiting dichromacy.

ΘΚΠ

the world > health and disease > ill health > a disease > disorders of eye > disordered vision > [noun] > colour blindness > person

idiopt1833

Daltonian1841

dichromatic1842

colour-blind1855

colour-defective1878

Daltonist1879

dichromat1893

monochromat1893

deuteranope1902

protanope1908

deuteranomal1915

protanomal1915

tritanope1915

protan1944

deutan1948

achromatopsic1986

1893 Mind 2 122 The results were obtained from two normal trichromatic reagents, and from two dichromates (green-blind and red-blind).

1897 E. W. Scripture New Psychol. xxiv. 336 The whole world appears to a dichromat as a mixture of two colours, somewhat in the same way as a landscape would appear to us if painted in red and violet or in green and violet.

1924 tr. J. von Kries in Helmholtz's Treat. Physiol. Optics II. 402 The writer suggests the names protanopes and deuteranopes to describe the two kinds of dichromats, that is, persons who lack the first component or the second component, respectively, of the normal visual organ.

1969 Nature 26 July 414/2 For human dichromats the presence of a restricted region in the visible spectrum that cannot be discriminated from white light..is considered to be diagnostic of dichromacy.

2009 Sci. Amer. (U.K. ed.) Apr. 40/1 Almost all nonprimate mammals are dichromats, with color vision based on just two kinds of visual pigments.

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

单词	dichromat
释义	dichromatn. Brit. /ˈdʌɪkrə(ʊ)mat/, U.S. /ˈdaɪkrəˌmæt/, /ˈdaɪkroʊˌmæt/ Forms: 1800s– dichromat, 1800s– dichromate. Origin: A borrowing from German. Etymon: German Dichromat. Etymology: < German Dichromat (1892 or earlier), back-formation < dichromatisch dichromatic adj., with reinterpretation of -at- as a reflex of classical Latin -ātus -ate suffix¹. Compare earlier dichromatic n. Compare also monochromat n. and trichromat n.With form dichromate compare -ate suffix¹. Ophthalmology and Physiology. A person or animal exhibiting dichromacy. ΘΚΠ the world > health and disease > ill health > a disease > disorders of eye > disordered vision > [noun] > colour blindness > person idiopt1833 Daltonian1841 dichromatic1842 colour-blind1855 colour-defective1878 Daltonist1879 dichromat1893 monochromat1893 deuteranope1902 protanope1908 deuteranomal1915 protanomal1915 tritanope1915 protan1944 deutan1948 achromatopsic1986 1893 Mind 2 122 The results were obtained from two normal trichromatic reagents, and from two dichromates (green-blind and red-blind). 1897 E. W. Scripture New Psychol. xxiv. 336 The whole world appears to a dichromat as a mixture of two colours, somewhat in the same way as a landscape would appear to us if painted in red and violet or in green and violet. 1924 tr. J. von Kries in Helmholtz's Treat. Physiol. Optics II. 402 The writer suggests the names protanopes and deuteranopes to describe the two kinds of dichromats, that is, persons who lack the first component or the second component, respectively, of the normal visual organ. 1969 Nature 26 July 414/2 For human dichromats the presence of a restricted region in the visible spectrum that cannot be discriminated from white light..is considered to be diagnostic of dichromacy. 2009 Sci. Amer. (U.K. ed.) Apr. 40/1 Almost all nonprimate mammals are dichromats, with color vision based on just two kinds of visual pigments. This entry has been updated (OED Third Edition, March 2014; most recently modified version published online March 2022). < n.1893
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