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Wiktionary
echolocator

n. 1 An organism capable of echolocation. 2 An organ that performs echolocation within an organism.

Usage examples of "echolocator".

The thumper’s echolocator showed a large area of very low density only a meter ahead.

The river dolphins that live in muddy water are probably the most skilled echolocators, but some open-sea dolphins have been shown in tests to be pretty good too.