tin foil

tinfoil

[tin-foil]
noun
tin, or an alloy of tin and lead, in the form of a thin sheet, much used as a wrapping for drugs, foods, tobacco, etc.
Also called, British, silver paper.


Origin:
1425–75; late Middle English tynfoile. See tin, foil2

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World English Dictionary
tinfoil (ˈtɪnˌfɔɪl)
 
n
1.  thin foil made of tin or an alloy of tin and lead
2.  thin foil made of aluminium; used for wrapping foodstuffs

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