English word ultrasound comes from English sound, English ultra-
| Dictionary entry | Language | Definition |
|---|---|---|
| sound | English (eng) | (British, slang) Good; acceptable; decent.. (mathematics, logic) Having the property of soundness.. (of sleep) Quiet and deep. Sound asleep means sleeping peacefully, often deeply.. Complete, solid, or secure.. Founded in law; legal; valid; not defective.. Healthy.. Heavy; laid on with force. (intransitive) Dive downwards, used of a whale.. (medicine) To examine with the instrument called a [...] |
| ultra- | English (eng) | Beyond, on the far side of, as in ultraviolet.. Beyond, outside of, as in ultrasonic.. Excessively, to an extreme, as in ultramicroscopic, ultra-careful.. Greater than normal quantity or importance, as in ultrasecret. |
| ultrasound | English (eng) | (ambitransitive) To treat with ultrasound. (medicine) The use of ultrasonic waves for diagnostic or therapeutic purposes.. (physics) Sound with a frequency greater than the upper limit of human hearing, which is approximately 20 kilohertz. |