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]