[ uhl-truh-son-ik ]
/ ˌʌl trəˈsɒn ɪk /


of, relating to, or utilizing ultrasound.

Origin of ultrasonic

First recorded in 1925–30; ultra- + sonic
Related formsul·tra·son·i·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ultrasonic

  • Has an ultrasonic dishwasher underneath, and it does some cooking on top, at the back.

    Space Viking|Henry Beam Piper
  • The Guide aimed quickly and pressed the trigger of the ultrasonic stunner.

    Hunter Patrol|Henry Beam Piper and John J. McGuire
  • From it projected the barrels of two kinds of weapons—explosive and ultrasonic.

  • Immediately, the ultrasonic paralyzers of the advancing paratimers went into action, and the mercenaries began dropping.

    Temple Trouble|Henry Beam Piper

British Dictionary definitions for ultrasonic


/ (ˌʌltrəˈsɒnɪk) /


of, concerned with, or producing waves with the same nature as sound waves but frequencies above audio frequenciesSee also ultrasound
Derived Formsultrasonically, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for ultrasonic



1923, "having frequency beyond the audible range," from ultra- + sonic. For sense, see supersonic.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for ultrasonic


[ ŭl′trə-sŏnĭk ]


Of or relating to acoustic frequencies above the range audible to the human ear, or above approximately 20,000 hertz.
Of, relating to, or involving ultrasound.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for ultrasonic


[ ŭltrə-sound′ ]

Sound whose frequency is above the upper limit of the range of human hearing (approximately 20 kilohertz).
See ultrasonography.
An image produced by ultrasonography.
Related formsultrasonic adjective (ŭl′trə-sŏnĭk)
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.