[1] : The Collaborative International Dictionary of English v.0.48

wad \wad\, n. probably of scand. origin; cf. sw. vadd wadding,
   dan vat, d.  g. watte. cf. wadmol.
   1913 webster
   1. a little mass, tuft, or bundle, as of hay or tow.
      --holland.
      1913 webster

   2. specifically: a little mass of some soft or flexible
      material, such as hay, straw, tow, paper, or old rope
      yarn, used for retaining a charge of powder in a gun, or
      for keeping the powder and shot close; also, to diminish
      or avoid the effects of windage. also, by extension, a
      dusk of felt, pasteboard, etc., serving a similar purpose.
      1913 webster

   3. a soft mass, especially of some loose, fibrous substance,
      used for various purposes, as for stopping an aperture,
      padding a garment, etc.
      1913 webster

   wed hook, a rod with a screw or hook at the end, used for
      removing the wad from a gun.
      1913 webster
see also:
wadmol wed hook 

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