adj.
Pronunciation: - ' sä-nik
Function: adjective
Date: 1923
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 < ultrasonic testing of metal>
– ul · tra · son · i · cal · ly \ -ni-k( ə -)l ē \ adverb