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Noun: man-o'-war  'man-u,wor
  1. Large siphonophore having a bladderlike float and stinging tentacles
    - Portuguese man-of-war, man-of-war, jellyfish
     
  2. A warship intended for combat
    - man-of-war, ship of the line

Type of: combat ship, siphonophore, war vessel, warship

Part of: genus Physalia, Physalia

Encyclopedia: Man-o'-war