Source : Webster's Revised Unabridged Dictionary (1913)

Tittle \Tit"tle\, n. [OE. titel, titil, apparently a dim. of
   tit, in the sense of small; cf. G. t["u]ttel a tittle, dim.
   of OHG. tutta teat. Perhaps, however, the same word as title,
   n.]
   A particle; a minute part; a jot; an iota.

         It is easier for heaven and earth to pass, than one
         tittle of the law to fail.               --Luke xvi.
                                                  17.

         Every tittle of this prophecy is most exactly verified.
                                                  --South.

Source : WordNet®

tittle
     n : a tiny or scarcely detectable amount [syn: {shred}, {scintilla},
          {whit}, {iota}, {smidgen}, {smidgeon}, {smidgin}, {smidge}]