asdic

noun
as·​dic | \ ˈaz-(ˌ)dik \

Definition of asdic

chiefly British
: sonar

First Known Use of asdic

1939, in the meaning defined above

History and Etymology for asdic

from asdics underwater echo ranging, probably from Anti-Submarine Division (British Admiralty department 1916–18) + -ics

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The first known use of asdic was in 1939

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