ultrasound

https://doi.org/10.1351/goldbook.11337
  1. Sound waves of frequency higher than the range audible to the human ear.
  2. Imaging technique that uses such sound waves to create a picture of internal body structures.
See also: ultrasonography
Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 817 [Terms] [Paper]