Flour n.  The finely ground meal of wheat, or of any other grain; especially, the finer part of meal separated by bolting; hence, the fine and soft powder of any substance; as, flour of emery; flour of mustard.
 Flour bolt, in milling, a gauze-covered, revolving, cylindrical frame or reel, for sifting the flour from the refuse contained in the meal yielded by the stones.
 Flour box a tin box for scattering flour; a dredging box.
 Flour dredge or Flour dredger, a flour box.
 Flour dresser, a mashine for sorting and distributing flour according to grades of fineness.
 Flour mill, a mill for grinding and sifting flour.