bit map

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or bit map  (bĭt′măp′)
n. Computers
A set of bits that represents a graphic image, with each bit or group of bits corresponding to a pixel in the image.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

bit′ map`

a piece of text, a drawing, etc., represented, as on a computer display, by the activation of certain dots in a rectangular matrix of dots.
bit′-mapped`, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
It is said to combine vector drawing, raster graphics and the Photoshop engine into a single app that is also scheduled for release next year, as per ( Ars Technica . 
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AGC will convert all NGA's Arc Digital Raster Graphics (ADRGs) into GeoPDFs.
Manelski has been involved with graphic arts and printing technology for more than 25 years and has worked with 3M Printing Products, Du Pont Electronic Imaging, Scitex and Raster Graphics prior to becoming president of BullDog Products.
In contrast with raster graphics programs like Photoshop, vector graphics programs like Adobe Illustrator are not organized around bitmaps but by the geometry of points, lines, and curves.