DICT.TW Dictionary Taiwan

 so·nar /ˈsoˌnɑr/
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 sonar
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 sonar
      n : 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
          anti-submarine detection investigation committee [syn: echo
          sounder, asdic]