Pronunciation: (dOO'u-tōn", dyOO'-), [key]
of two tones or colors.
1. a picture in two tones or colors.
a. a method of printing an illustration either in a dark and a tinted shade of the same color or in two different colors from two plates of a monochrome original made from negatives at different screen angles.
b. an illustration printed by this method.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.