The Collaborative International Dictionary of English v.0.48:

Misappropriation \Mis`ap*pro`pri*a"tion\, n.
   Wrong appropriation; wrongful use.
   [1913 Webster]

WordNet (r) 3.0 (2006):

misappropriation
    n 1: the fraudulent appropriation of funds or property entrusted
         to your care but actually owned by someone else [syn:
         embezzlement, peculation, defalcation,
         misapplication, misappropriation]
    2: wrongful borrowing; "his explanation was a misappropriation
       of sociological theory"