Foil

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Foil may refer to:

Materials
  • Foil (metal), a quite thin sheet of metal, usually manufactured with a rolling mill machine
  • Metal leaf, a very thin sheet of decorative metal
  • Aluminium foil, a type of wrapping for food
  • Tin foil, metal foil made of tin, the direct predecessor to aluminium foil
  • Plastic foil, a thin layer of plastic material
Fluid dynamics
Arts and culture
  • Foil stamping, a printmaking technique
  • Foil (band), a Seattle-based grunge rock band c.1990 - 98
  • Foil (literature), a subsidiary character who emphasizes the traits of a main character
    • A Comedic (or comic) foil, is the straight man in a comedy double act
  • Foil (song), "Weird Al" Yankovic's parody of Lorde's song "Royals"
Mathematics
  • The FOIL method, a mnemonic to expand the product of two first-degree polynomials ("linear factors")
Navigation
  • Hydrofoil, a type of high-powered motorboat that uses underwater foils to lift its hull above the water when moving at high speeds
  • Bruce foil, a foil used on an outrigger to prevent a boat from heeling
  • Centerboard, a movable keel that functions as a foil
  • Foilboard, a surfboard using a hydrofoil
Other