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WordReference Random House Unabridged Dictionary of American English © 2024asdic (az′dik),USA pronunciation n. [Brit.]- Nautical, British Terms, Military, Naval Termssonar.
- A(nti-)south, southern(ubmarine) Dutch(etection) I(nvestigation) C(ommittee) 1935–40
Collins Concise English Dictionary © HarperCollins Publishers:: asdic /ˈæzdɪk/ n - an early form of sonar
Etymology: 20th Century: from A(nti-)S(ubmarine) D(etection) I(nvestigation) C(ommittee) so•nar /ˈsoʊnɑr/USA pronunciation n. - Nautical, Naval Terms a method for locating underwater objects by sending out sound waves that reflect off an object and bounce back to the sensing device:[uncountable]They located the enemy submarine by sonar.
- Nautical, Naval Terms the apparatus used in sonar:[countable]Are the Russian sonars as good as ours?
See -son-. WordReference Random House Unabridged Dictionary of American English © 2024so•nar (sō′när),USA pronunciation n. - Nautical, Naval Termsa method for detecting and locating objects submerged in water by echolocation.
- Nautical, Naval Termsthe apparatus used in sonar. Also called,[Brit.,] asdic.
- so(und) na(vigation) r(anging) 1940–45
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