[ul.tra.son.ics] n pl (1924) 1: ultrasonic vibrations or compressional waves
2. sing in constr: the study of ultrasonic vibrations and their associated phenomena
3: ultrasonic devices
[ul.tra.son.ics] n pl (1924) 1: ultrasonic vibrations or compressional waves
2. sing in constr: the study of ultrasonic vibrations and their associated phenomena
3: ultrasonic devices
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012