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| ul·tra·sound [ últrə sòwnd ] (plural ul·tra·sounds) |
noun |
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| Definition: |
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1. high-frequency sound: sound of a frequency above the upper limit of the normal range of human hearing, which is about 20 kilohertz
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2. sound waves used in medicine: a technique that uses high-frequency sound waves for medical diagnosis and treatment, e.g. to create images of internal organs, to treat deep tissue disorders, and to break up kidney stones
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3. medicine medical exam using ultrasound: an examination of an internal body part, especially a fetus in the womb, using ultrasound technology
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