Source : Webster's Revised Unabridged Dictionary (1913)

Dilatoriness \Dil"a*to*ri*ness\, n.
   The quality of being dilatory; lateness; slowness; tardiness;
   sluggishness.

Source : WordNet®

dilatoriness
     n : slowness as a consequence of not getting around to it [syn:
         {procrastination}]