noun 1. the organized influence exerted by elderly people as a group, especially for social or political purposes or ends.
[greyz-bee] /ˈgreɪz bi/ noun, plural graysbies. 1. a serranid fish, Epinephelus cruentatus, inhabiting warm waters of the western Atlantic Ocean, having a reddish-gray body marked with vermilion spots.
noun 1. a scale of achromatic colors having several, usually ten, equal gradations ranging from white to black, used in television and photography. gray scale n. Gray-scale ultrasonography. spelling 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.