Wordnet 3.0
NOUN (1)
1. 
 the quality of being exact; 
- Example: "he demanded exactness in all details"- Example: "a man of great exactitude"[syn: exactness, exactitude]
The Collaborative International Dictionary of English v.0.48:
Exactitude \Ex*act"i*tude\, n. [Cf. F. exactitude.]
   The quality of being exact; exactness.
   [1913 Webster]
WordNet (r) 3.0 (2006):
exactitude
    n 1: the quality of being exact; "he demanded exactness in all
         details"; "a man of great exactitude" [syn: exactness,
         exactitude] [ant: inexactitude, inexactness]