Definition of ultrasonic
1 : having a frequency above the human ear's audibility limit of about 20,000 hertz —used of waves and vibrations
2 : utilizing, produced by, or relating to ultrasonic waves or vibrations
ultrasonicallyplay \ˌəl-trə-ˈsä-ni-k(ə-)lē\ adverb
Did You Know?
Ultrasound, or ultrasonography, works on the principle that sound is reflected at different speeds by tissues or substances of different densities. Ultrasound technology has been used medically since the 1940s. Sonograms, the pictures produced by ultrasound, can reveal heart defects, tumors, and gallstones; since low-power ultrasonic waves don't present any risks to a body, they're most often used to display fetuses during pregnancy in order to make sure they're healthy. Ultrasonics has many other uses, including underwater sonar sensing. High-power ultrasonics are so intense that they're actually used for drilling and welding.
First Known Use of ultrasonic
ULTRASONIC Defined for English Language Learners
Definition of ultrasonic for English Language Learners
—used to describe sounds that are too high for humans to hear
Medical Definition of ultrasonic
1a: having a frequency above the human ear's audibility limit of about 20,000 hertz—used of waves and vibrationsb: utilizing, produced by, or relating to ultrasonic waves or vibrations removal of tartar with an ultrasonic scaler
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