milling tool

Milling \Mill"ing\, n.
   The act or employment of grinding or passing through a mill;
   the process of fulling; the process of making a raised or
   intented edge upon coin, etc.; the process of dressing
   surfaces of various shapes with rotary cutters. See {Mill}.
   [1913 Webster]

   {High milling}, milling in which grain is reduced to flour by
      a succession of crackings, or of slight and partial
      crushings, alternately with sifting and sorting the
      product.

   {Low milling}, milling in which the reduction is effected in
      a single crushing or grinding.

   {Milling cutter}, a fluted, sharp-edged rotary cutter for
      dressing surfaces, as of metal, of various shapes.

   {Milling machine}, a machine tool for dressing surfaces by
      rotary cutters.

   {Milling tool}, a roller with indented edge or surface, for
      producing like indentations in metal by rolling pressure,
      as in turning; a knurling tool; a milling cutter.
      [1913 Webster]