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A submarine of the German navy.
(Nautical Terms) a German submarine, esp in World Wars I and II
[from German U-Boot, abbreviation for Unterseeboot, literally: undersea boat]
a German submarine.
[1910–15; < German U-Boot, short for Unterseeboot literally, undersea boat]
or “Unterseeboot” A German submarine.
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|Noun||1.||U-boat - a submersible warship usually armed with torpedoes|
attack submarine - a military submarine designed and armed to attack enemy shipping
auxiliary research submarine - a submarine for research purposes
conning tower - a raised bridge on a submarine; often used for entering and exiting
escape hatch - hatchway that provides a means of escape in an emergency
fleet ballistic missile submarine - a submarine carrying ballistic missiles
nautilus, nuclear submarine, nuclear-powered submarine - a submarine that is propelled by nuclear power
periscope - an optical instrument that provides a view of an otherwise obstructed field
schnorchel, schnorkel, snorkel breather, breather, snorkel - air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time
asdic, echo sounder, sonar - 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"