The Collaborative International Dictionary of English v.0.48:

Foliate \Fo"li*ate\, v. t. [imp. & p. p. Foliated; p. pr. &
   vb. n. Foliating.]
   1. To beat into a leaf, or thin plate. --Bacon.
      [1913 Webster]

   2. To spread over with a thin coat of tin and quicksilver;
      as, to foliate a looking-glass.
      [1913 Webster]