Main Entry: ul·tra·son·ic

Pronunciation: \-ˈsän-ik\

Function: adjective

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