u-boat
English Thesaurus
1. a submersible warship usually armed with torpedoes (noun.artifact)
| hyponym | : | attack submarine, |
| definition | : | a military submarine designed and armed to attack enemy shipping (noun.artifact) |
| part holonym | : | conning tower, |
| definition | : | a raised bridge on a submarine; often used for entering and exiting (noun.artifact) |
| part holonym | : | escape hatch, |
| definition | : | hatchway that provides a means of escape in an emergency (noun.artifact) |
| part holonym | : | periscope, |
| definition | : | an optical instrument that provides a view of an otherwise obstructed field (noun.artifact) |
| part holonym | : | asdic, echo sounder, sonar, |
| definition | : | 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) |
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