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.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Slit \Slit\, v. t. [imp. & p. p. Slit or Slitted; p. pr. & vb. n. Slitting.]

[OE. slitten, fr. sliten, AS. st[=i]tan to tear; akin to D. slijten to wear out, G. schleissen to slit, split, OHG. sl[=i]zan to split, tear, wear out, Icel. st[=i]ta to break, tear, wear out, Sw. slita, Dan. slide. Cf. Eclat, Slate, n., Slice.]

1. To cut lengthwise; to cut into long pieces or strips; as, to slit iron bars into nail rods; to slit leather into straps.

2. To cut or make a long fissure in or upon; as, to slit the ear or the nose.

3. To cut; to sever; to divide. [Obs.]

And slits the thin-spun life. --Milton.

Source: Webster's Revised Unabridged Dictionary (1913)