'Hairsplitter' definitions:

Definition of 'hairsplitter'

(from WordNet)
noun
A disputant who makes unreasonably fine distinctions

Definition of 'Hairsplitter'

From: GCIDE
  • Hairsplitter \Hair"split`ter\ (-spl[i^]t`t[~e]r), n. One who makes excessively fine or needless distinctions in reasoning; one who quibbles. "The caviling hairsplitter." --De Quincey. [1913 Webster]