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Medical Definition of Ultrasound/ultrasonography
1. A test in which high-frequency sound waves (ultrasound) are bounced off tissues and the echoes are converted into a picture (sonogram). (12 Dec 1998)
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1. A test in which high-frequency sound waves (ultrasound) are bounced off tissues and the echoes are converted into a picture (sonogram). (12 Dec 1998)