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ultra-sound
 
Noun ultra-sound has 2 senses
  1. ultrasound - very high frequency sound; used in ultrasonography
    --1 is a kind of sound
  2. sonography, ultrasonography, ultrasound - using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs
    --2 is a kind of imaging, tomography; prenatal diagnosis
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