noun Download 🔗Share Sound with a frequency greater than the upper limit of human hearing, which is approximately 20 kilohertz. Examples : "The doctor used ultrasounds to check the baby's development in the womb. " sound medicine technology physics frequency device Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share The use of ultrasonic waves for diagnostic or therapeutic purposes. Examples : "The doctor used ultrasounds to check on the baby's development in the mother's womb. " medicine technology sound physics device Chat with AIVocabulary GamePractice Reading