ultrasound

Definition

Sound with a frequency greater than the upper limit of human hearing, which is approximately 20 kilohertz.

Etymology

From ultra- + sound.

Example Sentences

• "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."

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