American Heritage Dictionary
(2)
Century Dictionary
GNU Webster's 1913
WordNet
(1)
Elsewhere on the web
Although echolocation has been suggested as a reason for the high encephalization level in odontocetes, it should be noted that not all aquatic mammals echolocate and echolocating terrestrial mammals (e.g., bats) are not particularly highly encephalized.— CiteULike: Everyone's library
It has long been known that whales use echolocation - emitting sounds that bounce back after hitting objects - to find food and navigate.— News24
It was the first time that the process had been directly observed during echolocation, according to the study, published in the British journal Biology Letters.— News24
They use echolocation (bouncing sound off objects to determine their location) to hunt and a series of high-pitched clicks to stun prey.— AroundTheCapitol.com

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