Filigree, a name given to a species of goldsmith's ornamental work fashioned out of fine metallic (usually gold or silver) wire into lace-like patterns; the art is of ancient date, and was skilfully practised by the Etruscans and Egyptians, as well as in Central Asia and India.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Filibuster * Filioque Controversy