Source : Webster's Revised Unabridged Dictionary (1913)

Thrower \Throw"er\, n.
   One who throws. Specifically:
   (a) One who throws or twists silk; a throwster.
   (b) One who shapes vessels on a throwing engine.

Source : WordNet®

thrower
     n 1: a person who twists silk or rayon filaments into a thread or
          yarn [syn: {throwster}]
     2: someone who projects something through the air (especially
        by a rapid motion of the arm)
     3: a craftsman who shapes pottery on a potter's wheel and bakes
        them it a kiln [syn: {potter}, {ceramicist}, {ceramist}]