Muller
MUL'LER, noun [Latin molaris, from mola, a mill-stone.]
1. A stone held in the hand with which colors and other matters are ground on another stone; used by painters and apothecaries.
2. An instrument used by glass grinders, being a piece of wood with the piece of glass to be ground cemented to one end, either convex in a basin, or concave in a sphere or bowl.