From The Collaborative International Dictionary of English v.0.48:
Mosaic \Mo*sa"ic\, a.
Of or pertaining to the style of work called mosaic; formed
by uniting pieces of different colors; variegated;
tessellated; also, composed of various materials or
ingredients.
[1913 Webster]
A very beautiful mosaic pavement. --Addison.
[1913 Webster]
Florentine mosaic. See under Florentine.
Mosaic gold.
(a) See Ormolu.
(b) Stannic sulphide, SnS2, obtained as a yellow scaly
crystalline powder, and used as a pigment in bronzing and
gilding wood and metal work. It was called by the
alchemists aurum musivum, or aurum mosaicum. Called
also bronze powder.
Mosaic work. See Mosaic, n.
[1913 Webster]