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ultrasound
[ uhl-truh-sound ]
noun
- Physics. sound with a frequency greater than 20,000 Hz, approximately the upper limit of human hearing.
- Medicine/Medical. the application of ultrasonic waves to therapy or diagnostics, as in deep-heat treatment of a joint or imaging of internal structures.
ultrasound
/ ˈʌltrəˌsaʊnd /
noun
- ultrasonic waves at frequencies above the audible range (above about 20 kHz), used in cleaning metallic parts, echo sounding, medical diagnosis and therapy, etc
ultrasound
/ ŭl′trə-sound′ /
- Sound whose frequency is above the upper limit of the range of human hearing (approximately 20 kilohertz).
- See ultrasonography
- An image produced by ultrasonography.
ultrasound
- A method of diagnosing illness and viewing internal body structures in which sound waves of high frequency are bounced off internal organs and tissues from outside the body. The technique measures different amounts of resistance the body parts offer to the sound waves, and then uses the data to produce a “picture” of the structures. Ultrasound is often used to obtain an image of the developing fetus in pregnant women; the image can confirm the presence of twins or triplets and can be used to diagnose some abnormalities.
Notes
Word History and Origins
Origin of ultrasound1
A Closer Look
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Example Sentences
The prison eventually allowed her to have an ultrasound scan at four months, and doctors told her she was having a girl.
She had to go into hospital three times a week during the pregnancy for dialysis and her baby’s progress was continually monitored via frequent ultrasound scans to identify and treat problems early.
As Porsha waited for Hope, a radiologist completed an ultrasound and noted that she had “a pregnancy of unknown location.”
After my blood tests came back as abnormal I was sent to Glasgow’s New Victoria Hospital, where I had an ultrasound, and finally a fibroscan.
After running a device that looks like an ultrasound scanner across our reporter’s stomach, a sound like a heartbeat is heard and "Dr Ruth" congratulates her on being pregnant.
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