Dictionary

ultrasound

noun ul·tra·sound \ˈəl-trə-ˌsand\

: a type of sound that is too high for humans to hear

medical : a method of producing images of the inside of the body by using a machine that produces sound waves which are too high to be heard

: an image that is made using ultrasound

Full Definition of ULTRASOUND

1
:  vibrations of the same physical nature as sound but with frequencies above the range of human hearing
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 sonography
3
:  a diagnostic examination using ultrasound
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First Known Use of ULTRASOUND

1923

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