ultrasonic Hear it!

ultrasonic definition

ultra·sonic (-sän′ik)

adjective

designating or of a frequency of mechanical vibrations above the range audible to the human ear, i.e., above 20,000 vibrations per second

Etymology: ultra- + sonic

Related Forms:

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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