bilge keel

Noun
  1. Either of two lengthwise fins attached along the outside of a ship's bilge;
    Reduces rolling (synset 102841413)
    is a type of: keel - one of the main longitudinal beams (or plates) of the hull of a vessel; can extend vertically into the water to provide lateral stability
    is a part of: vessel, watercraft - a craft designed for water transportation

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