Meaning of ULTRASONIC in English

ULTRASONIC

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

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.