Obs. rare. [Of doubtful genuineness; the author was a German; cf. G. folie = FOIL sb.1] A foil to put under a precious stone.

1

1671.  Schroter, in Birch, Hist. Royal Soc., II. 489–493 passim.

2

1818.  in Todd; and in mod. Dicts.

3