Gray-parrot
noun
1.
an ashy-gray, African parrot, Psittacus erithacus, having a short, red tail, noted especially for its ability to mimic speech.
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- Gray-pine
noun 1. .
- Gray-power
noun 1. the organized influence exerted by elderly people as a group, especially for social or political purposes or ends.
- Graysby
[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.
- Gray-scale
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.