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


of, relating to, or utilizing ultrasound.

Origin of ultrasonic

First recorded in 1925–30; ultra- + sonic


ul·tra·son·i·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

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 forms of ultrasonic

ultrasonically, 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

Medical 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.

Scientific 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.

Other words from ultrasound

ultrasonic adjective (ŭl′trə-sŏnĭk)
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.