of, pertaining to, or utilizing ultrasound.

1925–30; ultra- + sonic

ultrasonically, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To ultrasonic
World English Dictionary
ultrasonic (ˌʌltrəˈsɒnɪk)
See also ultrasound of, concerned with, or producing waves with the same nature as sound waves but frequencies above audio frequencies

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Word Origin & History

1923, "having frequency beyond the audible range," from ultra- + sonic. For sense, see supersonic. First record of ultrasound is from 1923; in ref. to ultrasonic techniques of detection or diagnosis it is recorded from 1958.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Medical Dictionary

ultrasonic ul·tra·son·ic (ŭl'trə-sŏn'ĭk)

  1. Of or relating to acoustic frequencies above the range audible to the human ear, or above approximately 20,000 hertz.

  2. Of, relating to, or involving ultrasound.

ul'tra·son'i·cal·ly adv.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
ultrasound   (ŭl'trə-sound')  Pronunciation Key 
  1. Sound whose frequency is above the upper limit of the range of human hearing (approximately 20 kilohertz).

  2. See ultrasonography.

  3. An image produced by ultrasonography.

ultrasonic adjective (ŭl'trə-sŏn'ĭk)
Our Living Language  : Many people use simple ultrasound generators. Dog whistles, for example, produce tones that dogs can hear but that are too high to be heard by humans. sound whose frequency is higher than the upper end of the normal range of human hearing (higher than about 20,000 hertz) is called ultrasound. (Sound at frequencies too low to be audible—about 20 hertz or lower—is called infrasound.) Medical ultrasound images, such as those of a fetus in the womb, are made by directing ultrasonic waves into the body, where they bounce off internal organs and other objects and are reflected back to a detector. Ultrasound imaging, also known as ultrasonography, is particularly useful in conditions such as pregnancy, when x-rays can be harmful. Because ultrasonic waves have very short wavelengths, they interact with very small objects and thus provide images with high resolution. For this reason ultrasound is also used in some microscopes. Ultrasound can also be used to focus large amounts of energy into very small spaces by aiming multiple ultrasonic beams in such a way that the waves are in phase at one precise location, making it possible, for example, to break up kidney stones without surgical incision and without disturbing surrounding tissue. Ultrasound's industrial uses include measuring thicknesses of materials, testing for structural defects, welding, and aquatic sonar.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Example sentences
Sadly for us, mice songs aren't music to our ears-their sounds are ultrasonic
  and out of range of human hearing.
It has been linked to the production of birdsong and the ultrasonic musings of
LU uses safety trolleys, which explains why ultrasonic checking is so
At the age of three, he showed no fear of the ultrasonic dryer in the kitchen.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature