Medical Dictionary
1ultrasound
noun ul·tra·sound \ˈəl-trə-ˌsau̇nd\
Medical Definition of ULTRASOUND
1
: vibrations of the same physical nature as sound but with frequencies above the range of human hearing—compare infrasound
2
: 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
3
: a diagnostic examination using ultrasound
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