Meaning of ULTRASONIC in English

ULTRASONIC

[ul.tra.son.ic] adj (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 "~ testing of metal" -- ul.tra.son.i.cal.ly adv

Merriam-Webster English vocab.      Английский словарь Merriam Webster.