n. One who nitpicks (finds fault in unimportant details).
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. someone who makes small and unjustified criticisms
Word Usage
""The ad sounds convincing -- but perhaps being a word nitpicker, the Sun does now 'might not mean much if Sun has drastically cut back due to plummeting sales," Rich Partridge, an analyst at Ideas International, said in an e-mail."