a scale of achromatic colors having several, usually ten, equal gradations ranging from white to black, used in television and photography.
gray scale n.
US spelling of “grey-scale”.
- Gray-scale ultrasonography
gray-scale ultrasonography n. Ultrasonography that displays small differences in an acoustical impedance as if they were different shades of gray.
noun 1. a grayish-brown sea eagle, Haliaetus albicilla, of the Old World and Greenland, having a white tail.
noun 1. a skate, Raja batis, of coastal seas off Great Britain.
noun 1. a snapper, Lutjanus griseus, of shallow waters off the coast of Florida, having a grayish-green body with a brown spot on each scale.