The Collaborative International Dictionary of English v.0.48:

Slice \Slice\, n. [OE. slice, sclice, OF. esclice, from
   esclicier, esclichier, to break to pieces, of German origin;
   cf. OHG. sl[imac]zan to split, slit, tear, G. schleissen to
   slit. See Slit, v. t.]
   1. A thin, broad piece cut off; as, a slice of bacon; a slice
      of cheese; a slice of bread.
      [1913 Webster]

   2. That which is thin and broad, like a slice. Specifically:
      (a) A broad, thin piece of plaster.
      (b) A salver, platter, or tray. [Obs.]
      (c) A knife with a thin, broad blade for taking up or
          serving fish; also, a spatula for spreading anything,
          as paint or ink.
      (d) A plate of iron with a handle, forming a kind of
          chisel, or a spadelike implement, variously
          proportioned, and used for various purposes, as for
          stripping the planking from a vessel's side, for
          cutting blubber from a whale, or for stirring a fire
          of coals; a slice bar; a peel; a fire shovel. [Cant]
      (e) (Shipbuilding) One of the wedges by which the cradle
          and the ship are lifted clear of the building blocks
          to prepare for launching.
      (f) (Printing) A removable sliding bottom to galley.
          [1913 Webster]

   Slice bar, a kind of fire iron resembling a poker, with a
      broad, flat end, for stirring a fire of coals, and
      clearing it and the grate bars from clinkers, ashes, etc.;
      a slice.
      [1913 Webster]

WordNet (r) 3.0 (2006):

slice bar
    n 1: iron bar used to loosen and rake clinkers out of furnaces