Source : Webster's Revised Unabridged Dictionary (1913)

Skittle \Skit"tle\, a.
   Pertaining to the game of skittles.

   {Skittle alley}, an alley or court in which the game of
      skittles is played.

   {Skittle ball}, a disk or flattish ball of wood for throwing
      at the pins in the game of skittles.

Source : WordNet®

skittle ball
     n : ball used to knock down ninepins [syn: {ninepin ball}]