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ultrasonic
1 a: having a frequency above the human ear's audibility limit of about 20,000 hertz —used of waves and vibrations b: utilizing, produced by, or relating to ultrasonic waves or vibrations <removal of tartar with an ultrasonic scaler>2: ultrasound
— ul·tra·son·i·cal·ly \-i-k(ə-)lē\
 adverb
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