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Synset

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
<noun.artifact>   freq. cnt.: 6 freq. cnt.: 6

sample sentences

"sonar is an acronym for sound navigation ranging"
"asdic is an acronym for antisubmarine detection investigation committee"
semantic pointers
hypernym
part meronym
part holonym