foil

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foil

(foyl),
An extremely thin pliable sheet of metal.

foil

(foil) metal in the form of an extremely thin, pliable sheet.

foil

Dentistry
A thin, typically malleable laminate of metal (e.g., gold foil) used for tooth restoration.

Sports medicine
A lightweight fencing sword with no cutting edges and a rounded button at its point.
 
Vox populi
A person or thing placed or associated with another to provide marked contrast between the two.

foil

(foyl)
An extremely thin pliable sheet of metal.