ultrasonic

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ultrasonic

 [ul″trah-son´ik]
beyond the audible range; relating to sound waves having a frequency of more than 20,000 Hz.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ul·tra·son·ic

(ŭl'tră-son'ik),
Relating to energy waves similar to those of sound but of higher frequencies (above 20,000 Hz).
[ultra- + L. sonus, sound]
Farlex Partner Medical Dictionary © Farlex 2012

ultrasonic

(ŭl′trə-sŏn′ĭk)
adj.
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® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

ultrasonic

adjective Referring to an electromagnetic frequency faster than sound waves–eg, ≥ 30,000 Hz
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

ul·tra·son·ic

(ŭl'tră-son'ik)
Relating to energy waves similar to those of sound but of higher frequencies (above 30,000 Hz).
[ultra- + L. sonus, sound]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

ultrasonic

Pertaining to sound waves above the upper limit of audibility, that is above about 20,000 Hz.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

ul·tra·son·ic

(ŭl'tră-son'ik)
Relating to energy waves similar to those of sound but of higher frequencies (above 20,000 Hz).
[ultra- + L. sonus, sound]
Medical Dictionary for the Dental Professions © Farlex 2012