(noun) using the reflections of high- frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs
(noun) very highfrequency sound; used in ultrasonography
Definitions for Hum
(noun) a monotonous sound like that of an insect in motion
(verb) to be copiously supplied
(verb) to fly, turn, or move rapidly with a fluttering or vibratory sound