Commonly used to observe fetal growth

• Using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram)

Wiktionary Word definitions in Wiktionary
n. 1 (context medicine English) The use of ultrasound to produce diagnostic images of the internal organs of the body, or of a foetus. 2 The use of ultrasound to form images of underwater structures.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1960, from ultra- + sonography (see sonogram ).

WordNet Word definitions in WordNet
n. 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 [syn: sonography , ultrasound ]