[uhl-truh-suh-nog-ruh-fee, -soh-]
a diagnostic imaging technique utilizing reflected high-frequency sound waves to delineate, measure, or examine internal body structures or organs.

1950–55; ultra- + sono- + -graphy

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World English Dictionary
ultrasonography (ˌʌltrəsəˈnɒɡrəfɪ)
the technique of using ultrasound to produce pictures of structures within the body, as for example of a fetus

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American Heritage
Medical Dictionary

ultrasonography ul·tra·so·nog·ra·phy (ŭl'trə-sə-nŏg'rə-fē)
Diagnostic imaging in which ultrasound is used to visualize an internal body structure or a developing fetus. Also called echography, sonography.

ul'tra·so·nog'ra·pher n.
ul'tra·son'o·graph'ic (-sŏn'ə-grāf'ĭk, -sō'nə-) adj.
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American Heritage
Science Dictionary
ultrasonography   (ŭl'trə-sə-nŏg'rə-fē)  Pronunciation Key 
  1. Diagnostic imaging in which ultrasound is used to image an internal body structure or a developing fetus. See Note at ultrasound.

  2. An imaging technology that uses high-frequency sound waves to visualize underwater objects, topography, boundaries between layers, and currents. It is often used to locate underwater vehicles on the ocean floor. The sound waves are broadcast, and the timing and frequency shift of their echoes are analyzed in much the same manner as in sonar to produce an image or map of the phenomena or objects under investigation. Also called ultrasound.

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