What is "lifting sail"

Lifting \Lift"ing\, a. Used in, or for, or by, lifting. Lifting bridge, a lift bridge. Lifting jack. See 2d Jack, 5. Lifting machine. See Health lift, under Health. Lifting pump. (Mach.)

1. A kind of pump having a bucket, or valved piston, instead of a solid piston, for drawing water and lifting it to a high level.

2. A pump which lifts the water only to the top of the pump, or delivers it through a spout; a lift pump.

   Lifting rod, a vertical rod lifted by a rock shaft, and imparting motion to a puppet valve; -- used in the engines of river steamboats.

   Lifting sail (Naut.), one which tends to lift a vessel's bow out of water, as jibs and square foresails.