cutwater

 The fore part of a ship's prow, which cuts the water.  [1913 Webster]

 A starling or other structure attached to the pier of a bridge, with an angle or edge directed up stream, in order better to resist the action of water, ice, etc.; the sharpened upper end of the pier itself.  [1913 Webster]

 A sea bird of the Atlantic (Rhynchops nigra); -- called also black skimmer, scissorsbill, and razorbill. See Skimmer.  [1913 Webster]