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(Electronics) an early form of sonar
[C20: from A(nti-)S(ubmarine) D(etection) I(nvestigation) C(ommittee)]
1. a method for detecting and locating objects submerged in water by echolocation.
2. the apparatus used in sonar.
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|Noun||1.||asdic - a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return; "sonar is an acronym for sound navigation ranging"; "asdic is an acronym for antisubmarine detection investigation committee"|
measuring device, measuring instrument, measuring system - instrument that shows the extent or amount or quantity or degree of something
navigational instrument - an instrument used for navigating
pinger - a pulse generator used for echo sounding in sonar
pulse generator - a generator of single or multiple voltage pulses; usually adjustable for pulse rate