Source : Webster's Revised Unabridged Dictionary (1913)

Plasterer \Plas"ter*er\, n.
   1. One who applies plaster or mortar. ``Thy father was a
      plasterer.'' --Shak.

   2. One who makes plaster casts. ``The plasterer doth make his
      figures by addition.'' --Sir H. Wotton.

Source : WordNet®

plasterer
     n : a worker skilled in applying plaster