The Collaborative International Dictionary of English v.0.48:
Dilatoriness \Dil"a*to*ri*ness\, n. The quality of being dilatory; lateness; slowness; tardiness; sluggishness. [1913 Webster]WordNet (r) 3.0 (2006):
dilatoriness n 1: slowness as a consequence of not getting around to it [syn: dilatoriness, procrastination]