| ̷ ̷(ˌ) ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ noun
Etymology: echo (I) + location
1. : a process that is used by an animal (as a bat) to orient itself and avoid obstacles especially in darkness and that involves emission of high-frequency sounds which are reflected back from environing surfaces and thus indicate the relative distance and direction of such surfaces
2. : a technical process (as in sounding or seismography) for locating a distant object by measuring the time a wave takes to travel to and from the object