ultrasonography

Từ điển WordNet v3.1 - WordNet Dictionary

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
• Syn:
sonography, echography, ultrasound
• Hypernyms:
imaging, tomography, prenatal diagnosis
• Hyponyms:
A-scan ultrasonography, B-scan ultrasonography