gray-scale ultrasonography
n.
Ultrasonography that displays small differences in an acoustical impedance as if they were different shades of gray.
Words nearby gray-scale ultrasonography
gray whale,
gray wolf,
gray's inn,
gray-cheeked thrush,
gray-headed,
gray-scale ultrasonography,
grayanotoxin,
grayback,
graybeard,
grayfish,
grayhound