The Collaborative International Dictionary of English v.0.48:
Overcareful \O"ver*care"ful\ ([=o]"v[~e]r*k[^a]r"f[.u]l), a. Too careful. --Shak. [1913 Webster]WordNet (r) 3.0 (2006):
overcareful adj 1: excessively or unduly careful [syn: overcareful, too- careful]