Source : Webster's Revised Unabridged Dictionary (1913)

Slitting \Slit"ting\,
   a. & n. from {Slit}.

   {Slitting file}. See Illust.
   (i) of {File}.

   {Slitting mill}.
   (a) A mill where iron bars or plates are slit into narrow
       strips, as nail rods, and the like.
   (b) A machine used by lapidaries for slicing stones, usually
       by means of a revolving disk, called a slicer, supplied
       with diamond powder.

   {Slitting roller}, one of a pair of rollers furnished with
      ribs entering between similar ribs in the other roller,
      and cutting like shears, -- used in slitting metals.