Muller /(?)/

Mull·er

Muller

n.
  1. One who, or that which, mulls.
  2. A vessel in which wine, etc., is mulled over a fire.

Muller

n.
  1. A stone or thick lump of glass, or kind of pestle, flat at the bottom, used for grinding pigments or drugs, etc., upon a slab of similar material.