Mullar, denotes a stone flat and even at bottom, but round atop; used for grinding of matters on a marble.—The apothecaries use mullers to prepare many of their tephaceous powders; and painters for their colours, either dry or in oil.

Muller is an instrument used by the glass-grinders; being a piece of wood, to one end whereof is cemented the glass to be ground, whether convex in a basin, or concave in a sphere or bowl.—The muller is ordinarily about six inches long, turned round; the cement they use is composed of ashes and pitch. See Grinding.