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tinfoil

[tin-foil]
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noun
  1. 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.

Origin of tinfoil

First recorded in 1425–75, tinfoil is from the late Middle English word tynfoile. See tin, foil2
Also called, British, silver paper.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for tinfoil

tinfoil

noun
  1. thin foil made of tin or an alloy of tin and lead
  2. thin foil made of aluminium; used for wrapping foodstuffs
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for tinfoil

n.

late 15c., from tin (n.) + foil (n.).

Online Etymology Dictionary, © 2010 Douglas Harper