digital

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digital (dij-it-ăl) adj.
1. relating to a finger or toe.

2. relating to or designating information that can be represented by a series of numbers. d. hearing aid see hearing aid. d. image an electronically produced image, such as an image produced by digital radiography, made up of pixels, each of which has numbers to represent its position and shade. See digitization. d. radiography see radiography. d. subtraction a radiological technique that enhances X-ray images, most commonly of blood vessels, in which a digitized image taken before addition of the contrast medium is subtracted by computer from the images taken after contrast injection.

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