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English definition of “ultrasound”

ultrasound

noun uk   /ˈʌl.trə.saʊnd/ us  
[U] special sound waves used in such processes as examining organs inside the body and directing the route of submarines: They'll use ultrasound to monitor her ovaries. ultrasound scanning/imaging [C] an ultrasound scan
(Definition of ultrasound from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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