Webster's Revised Unabridged Dictionary · 1913

Filigrain

Filigrain , noun

[Sp. filigrana (compare Italian filigrana, English filigrane), from Latin filuma thread + granum grain. See File a row, and Grain, and compare Filigree.]

Filigree. [Archaic]
With her head... touches the crown of filigrane. — Longfellow

Also: Filigrane