Source : Webster's Revised Unabridged Dictionary (1913)

Acquisitiveness \Ac*quis"i*tive*ness\, n.
   1. The quality of being acquisitive; propensity to acquire
      property; desire of possession.

   2. (Phren.) The faculty to which the phrenologists attribute
      the desire of acquiring and possessing. --Combe.

Source : WordNet®

acquisitiveness
     n : strong desire to acquire and possess