Medical Dictionary


noun ul·tra·sound \ˈəl-trə-ˌsand\

Medical Definition of ULTRASOUND

:  vibrations of the same physical nature as sound but with frequencies above the range of human hearing—compare infrasound
:  the diagnostic or therapeutic use of ultrasound and especially a noninvasive technique involving the formation of a two-dimensional image used for the examination and measurement of internal body structures and the detection of bodily abnormalities—called also echography, sonography, ultrasonography
:  a diagnostic examination using ultrasound
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