sonar

1 definition found

From WordNet (r) 3.0 (2006) [wn]:

sonar

noun

1: 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" [syn: {sonar}, {echo sounder}, {asdic}]


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