Definition:
1. n. A method of sensing surrounding objects that employs pulses of high-frequency sound. The resulting echoes bounce back from any objects surfaces and enables the organism that released the high-frequency sound to construct a three dimensional image of its surroundings. Echolocation is used by some mammals and a small number of cave-dwelling birds. (Source: Burnie)
2. n. A process of navigating that uses reflected sound and is most often associated with bats but also present in some birds (swifts and nightjar relatives). (Source: Sibley)
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