Foil

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Foil may refer to:

In aeronautics:

  • Airfoil, used on aircraft
  • Parafoil, a nonrigid airfoil, inflated during use

In navigation:

  • Hydrofoil, a type of boat using foils designed for water
  • Bruce foil, a foil used on an outrigger to prevent a boat from heeling
  • Centreboard, a movable keel that functions as a foil
  • Foilboard, a surfboard using a hydrofoil

Foil may also be:

In other languages