The Collaborative International Dictionary of English v.0.48:

Plucker \Pluck"er\, n.
   1. One who, or that which, plucks.
      [1913 Webster]

            Thou setter up and plucker down of kings. --Shak.
      [1913 Webster]

   2. A machine for straightening and cleaning wool.
      [1913 Webster] Pluecker tube