The Collaborative International Dictionary of English v.0.48:
Acquisitiveness \Ac*quis"i*tive*ness\, n. 1. The quality of being acquisitive; propensity to acquire property; desire of possession. [1913 Webster] 2. (Phren.) The faculty to which the phrenologists attribute the desire of acquiring and possessing. --Combe. [1913 Webster]WordNet (r) 3.0 (2006):
acquisitiveness n 1: strong desire to acquire and possess