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Noun: waterline  'wotur`lIn
  1. A line corresponding to the surface of the water when the vessel is afloat on an even keel; often painted on the hull of a ship
    - water line, water level
Noun: water line  wotur lIn
  1. A line marking the level reached by a body of water
    - watermark

Derived forms: waterlines, water lines

Type of: line

Encyclopedia: Water line

Waterline