tinfoil

[ tin-foil ]

/ ˈtɪnˌfɔɪl /

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 of tinfoil

First recorded in 1425–75, tinfoil is from the late Middle English word tynfoile. See tin, foil²

So don your tinfoil hat and learn all about TrapWire, Stratfor, and what you should really be worrying about.

TrapWire: The Less-Than-Advertised System To Spy On Americans |Sarah Hedgecock |August 14, 2012 |DAILY BEAST
On opening it he found the heads of the suspected burglars packed in tinfoil and in a good state of preservation.

Remarks |Bill Nye
The procession, as usual, was enacted by couples, with tinfoil halberds on their shoulders.

The Kingdom of God is Within You, What is Art |Lyof N. Tolstoi
Metal plates or sheets of tinfoil serve nicely for this purpose.

Letters of a Radio-Engineer to His Son |John Mills

But the cutlass was made of lath, covered with tinfoil, and broke as it fell.

Motor Matt's Peril, or, Cast Away in the Bahamas |Stanley R. Matthews
He unrolled from one leg of the prisoner a little cylinder of paper covered with tinfoil and tied firmly in its place.

The Magnificent Adventure |Emerson Hough

tinfoil

/ (ˈtɪnˌfɔɪl) /

thin foil made of tin or an alloy of tin and lead

thin foil made of aluminium; used for wrapping foodstuffs