Source : Webster's Revised Unabridged Dictionary (1913)

Filigrain \Fil"i*grain\, Filigrane \Fil"i*grane\, n. [Sp.
   filigrana (cf. It. filigrana, E. filigrane), fr. L. filuma
   thread + granum grain. See {File} a row, and {Grain}, and cf.
   {Filigree}.]
   Filigree. [Archaic]

         With her head . . . touches the crown of filigrane.
                                                  --Longfellow.