Wordnet 3.0
NOUN (1)
1. 
 a tiny or scarcely detectable amount; 
[syn: shred, scintilla, whit, iota, tittle, smidgen, smidgeon, smidgin, smidge]
WordNet (r) 3.0 (2006):
smidgeon
    n 1: a tiny or scarcely detectable amount [syn: shred,
         scintilla, whit, iota, tittle, smidgen,
         smidgeon, smidgin, smidge]