ultrasound

noun

1. (countable, uncountable)Sound with a frequency greater than the upper limit of human hearing, which is approximately 20 kilohertz.
2. (countable, informal, metonymically, uncountable)Ultrasonography.
3. (countable, informal, metonymically, uncountable)Ultrasonography.
4. (countable, uncountable)Therapeutically applied ultrasonic energy.

   “Ultrasound as a treatment for degenerative arthritis was in its infancy. It might eventually turn out to be as effective as the Salk vaccine, or as bogus as the science of phrenology.”

   “But after a few visits to share details about ultrasounds and such, Juno and Mark find they have similar interests in music and movies - and Juno does have extraordinary tastes for someone her age, from the songs of Iggy and the Stooges to the horror flicks of Dario Argento.”

   “It’s estimated only 0.1% of antibodies circulating in the bloodstream enter the brain – this also includes the therapeutic antibodies currently used in clinical trials. An approach my team is taking is to use ultrasound to temporarily open the blood-brain barrier, which increases the uptake of Alzheimer’s drugs or antibody fragments.”

verb

1. (ambitransitive)To treat with ultrasound.