Source : Webster's Revised Unabridged Dictionary (1913)

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

Source : WordNet®

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}]
     2: wrongful borrowing; "his explanation was a misappropriation
        of sociological theory"