adjective Date: 1923 having a frequency above the human ear's audibility limit of about 20,000 hertz, utilizing, produced by, or relating to ~ waves or vibrations , ~ally adverb
ULTRASONIC
Meaning of ULTRASONIC in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012