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achromatic color[¦a·krə¦mad·ik ′kəl·ər]
A color that has no hue or saturation but only brightness, such as white, black, and various shades of gray.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
White light; a color that does not elicit hue.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.