Source : Webster's Revised Unabridged Dictionary (1913)

Splitter \Split"ter\, n.
   One who, or that which, splits.

Source : WordNet®

splitter
     n 1: a worker who splits fish and removes the backbone
     2: a taxonomist who classifies organisms into many groups on
        the basis of relatively minor characteristics [syn: {divider}]
        [ant: {lumper}]
     3: a laborer who splits logs to build split-rail fences [syn: {rail-splitter}]