ultrasound
ul-tra-sound · noun
Definitions
noun
- 1.
Sound waves with frequencies higher than the upper limit of human hearing, typically above 20,000 Hz.
- 2.
A medical imaging technique using high-frequency sound waves to produce images of internal body structures.
- 3.
An examination or image produced using this technique.
Forms
plural: ultrasounds
Related words
Etymology
From English ultra- meaning "beyond" + sound, referring to sound beyond the range of human hearing.