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ultrasonic

Flag: gbEnglishOxford New American Dictionary

ultrasonic /ˌəltrəˈsänik, ˌəltrəˈsɑnɪk /
adjective of or involving sound waves with a frequency above the upper limit of human hearing.
– DERIVATIVES
ultrasonically /ˌəltrəˈsänək(ə)lē , ˌəltrəˈsɑnək(ə)li / adverb