echo location

echolocation

[ek-oh-loh-key-shuhn]
noun
1.
the general method of locating objects by determining the time for an echo to return and the direction from which it returns, as by radar or sonar.
2.
Zoology. the sonarlike system used by dolphins, bats, and other animals to detect and locate objects by emitting usually high-pitched sounds that reflect off the object and return to the animal's ears or other sensory receptors.

Origin:
1944; echo + location

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Collins
World English Dictionary
echolocation (ˌɛkəʊləʊˈkeɪʃən)
 
n
determination of the position of an object by measuring the time taken for an echo to return from it and its direction

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

echolocation
1944, from echo + location.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
echolocation   (ěk'ō-lō-kā'shən)  Pronunciation Key 
Sonar, especially of animals, such as bats and toothed whales. See more at sonar.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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