The Collaborative International Dictionary of English v.0.48:

meticulosity \meticulosity\ n.
   strict attention to minute details; the quality of being
   meticulous.

   Syn: meticulousness, punctiliousness, scrupulousness.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

meticulosity
    n 1: strict attention to minute details [syn: meticulousness,
         meticulosity, punctiliousness, scrupulousness]