splitter

noun

1. a worker who splits fish and removes the backbone

   noun.person

   Source: WordNet 3.0

2. a taxonomist who classifies organisms into many groups on the basis of relatively minor characteristics

   noun.person

   Synonyms divider

   Antonyms lumper

   Source: WordNet 3.0

3. a laborer who splits logs to build split-rail fences

   noun.person

   Synonyms rail-splitter

   Source: WordNet 3.0

4. One who, or that which, splits.

   noun

   Source: webster1913