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Definition of Tinfoil
1. Noun. Foil made of tin or an alloy of tin and lead.
Definition of Tinfoil
1. a thin metal sheeting [n -S]
Medical Definition of Tinfoil
1. 1. Tin rolled into extremely thin sheets. 2. A base metal foil used as a separating material, as between the cast and denture base material during flasking and curing procedures. (05 Mar 2000)