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A defect in perception of colors, caused by a deficiency of certain specialized cells in the retina that are sensitive to different colors. The condition may be partial (as in “red-green colorblindness,” in which a person cannot distinguish red from green), or complete (in which the person sees all colors as gray).

Note: By extension, the law is said to be colorblind in its judgments, which are supposed to ignore a defendant’s race.


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  • Color-blind

    [kuhl-er-blahynd] /ˈkʌl ərˌblaɪnd/ adjective 1. Ophthalmology. pertaining to or affected with . 2. Photography. (of an emulsion) sensitive only to blue, violet, and ultraviolet rays. 3. showing or characterized by freedom from racial bias; not influenced by skin color.

  • Color-blindness

    noun 1. inability to distinguish one or several chromatic colors, independent of the capacity for distinguishing light and shade. 2. complete inability to distinguish colors of the spectrum, with all objects appearing as shades of gray, black, and white, varying only as to lightness and darkness; achromatopsia. n. 1844, replacing Daltonism (after English chemist John […]

  • Colorbreed

    [kuhl-er-breed] /ˈkʌl ərˌbrid/ verb (used without object), colorbred, colorbreeding. Genetics. 1. to plants or animals selectively for the production of new varieties having a specific or shade.

  • Colorcast

    [kuhl-er-kast, -kahst] /ˈkʌl ərˌkæst, -ˌkɑst/ noun 1. a television program in . verb (used with or without object), colorcast, colorcasting. 2. to or televise in .

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