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Từ điển WordNet v3.1 - WordNet Dictionary
pigboat
a submersible warship usually armed with torpedoes
• Syn:
submarine, sub, U-boat
• Derivationally related forms:
submarine (for: submarine)
• Hypernyms:
submersible, submersible warship
• Hyponyms:
attack submarine, auxiliary research submarine, fleet ballistic missile submarine, nautilus, nuclear submarine, nuclear-powered submarine
• Part Meronyms:
conning tower, escape hatch, periscope, snorkel, schnorkel,
schnorchel, snorkel breather, breather, sonar, echo sounder, asdic
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