The Collaborative International Dictionary of English v.0.48:

Potentiality \Po*ten`ti*al"i*ty\, n.
   The quality or state of being potential; possibility, not
   actuality; inherent capability or disposition, not actually
   exhibited.
   [1913 Webster]

WordNet (r) 3.0 (2006):

potentiality
    n 1: the inherent capacity for coming into being [syn:
         potential, potentiality, potency]
    2: an aptitude that may be developed [syn: capability,
       capableness, potentiality] [ant: incapability,
       incapableness]