ultrasonic [i ^ltrqs1nik | `s9n` ]     (순위: 11722 - 대졸 수준)   뜻  형) [물리] 초음파의 Mean  Of or relating to acoustic frequencies above the range audible to the human ear, or above approximately 20,000 hertz. 예문 1. ultrasonic waves (초음파) 2. ultrasonic vibrations (초음파 진동) 3. ultrasonic cleaning (초음파 세척)