Foil may refer to:

* Metal leaf, a thin sheet of metal
* Aluminium foil, a type of wrapping for food
* Plastic foil, a thin layer of plastics

Fluid Mechanics:
* Foil (fluid mechanics), a type of wing or blade used to provide lift
* Foil bearing, a type of fluid bearing

Paper making:
* Foil (papermaking), a type of ving under the wire in the wire section of a paper machine creating a vacuum pulse to eliminate water from the stock (fibre/water slurry).
* Ultrasonic foil (papermaking), a type of high frequency vibrating foil under the wire, creating cavitation, imploding vacuum bubbles, in the stock on the wire. The shock waves from the imploding bubbles will distribute the fibres more uniform in the paper web and this will give a stronger paper.

In aeronautics:
* Airfoil, used on aircraft
* Parafoil, a nonrigid airfoil, inflated during use

In arts and culture:
* Foil stamping, printmaking technique
* Foil (band), a Seattle grunge rock group c.1990-1998.
* Foil (literature), a character who emphasizes the traits of a main character
* Comedic foil, (or comic foil), is the straight man in a comedy team.
* Film Over Incandescent Light, an image projection technique

In mathematics:
* FOIL rule, a way to expand polynomials

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:
* First Order Inductive Learner - a rule-based learning algorithm.
* FOIL programming language, one of two defunct computer programming languages
* Foil (fencing), one of the three weapons used in modern fencing

Wikimedia Foundation. 2010.


Look at other dictionaries:

  • Foil — Foil, n. [OE. foil leaf, OF. foil, fuil, fueil, foille, fueille, F. feuille, fr. L. folium, pl. folia; akin to Gr. ?, and perh. to E. blade. Cf. {Foliage}, {Folio}.] 1. A leaf or very thin sheet of metal; as, brass foil; tin foil; gold foil.… …   The Collaborative International Dictionary of English

  • Foil — Foil, n. 1. Failure of success when on the point of attainment; defeat; frustration; miscarriage. Milton. [1913 Webster] Nor e er was fate so near a foil. Dryden. [1913 Webster] 2. A blunt weapon used in fencing, resembling a smallsword in the… …   The Collaborative International Dictionary of English

  • Foil — (foil), v. t. [imp. & p. p. {Foiled} (foild); p. pr. & vb. n. {Foiling}.] [F. fouler to tread or trample under one s feet, to press, oppress. See {Full}, v. t.] 1. To tread under foot; to trample. [1913 Webster] King Richard . . . caused the… …   The Collaborative International Dictionary of English

  • foil — foil1 [foil] vt. [ME foilen < OFr fuler, to trample on, subdue: see FULL2] 1. to keep from being successful; thwart; frustrate 2. Hunting to make (a scent, trail, etc.) confused, as by recrossing, in order to balk the pursuers n. 1. Archaic… …   English World dictionary

  • foil — [ fɔjl ] n. m. • 1979; mot angl. « feuille, lame » ♦ Anglic. Plan porteur équipant les bateaux capables de déjauger. Foils latéraux de l hydroptère. ● foil nom masculin (anglais foil, feuille) Plan porteur inclinable destiné aux embarcations… …   Encyclopédie Universelle

  • FOIL — Saltar a navegación, búsqueda FOIL es un algoritmo usado en informática en el campo de la inteligencia artificial y más concretamente en el campo de la programación lógica inductiva (ILP) para aprender reglas de la lógica de primer orden que… …   Wikipedia Español

  • foil — Ⅰ. foil [1] ► VERB ▪ prevent the success of. ORIGIN originally in the sense «trample down»: perhaps from Old French fouler to full cloth, trample , from Latin fullo fuller . Ⅱ. foil [2] ► NOUN 1) metal h …   English terms dictionary

  • Foil — Foil, v. t. [See 6th {File}.] To defile; to soil. [Obs.] [1913 Webster] …   The Collaborative International Dictionary of English

  • foil — I verb baffle, balk, be obstructive, bring to naught, cause to be nugatory, check, confound, counter, counteract, countermine, cripple, crush, dash, dash one s hopes, defeat, disable, disappoint, disrupt, eludere, frustrate, get in the way of,… …   Law dictionary

  • foil — [n] contrast antithesis, background, complement, counterblow, defense, guard, setting; concept 665 foil [v] circumvent, nip in the bud baffle, balk, beat, bilk, bollix*, buffalo*, check, checkmate, counter, crab, cramp, crimp, curb, dash, defeat …   New thesaurus