probabilistic

from WordNet (r) 3.0 (2006)

probabilistic
    adj 1: of or relating to the Roman Catholic philosophy of
           probabilism
    2: of or relating to or based on probability; "probabilistic
       quantum theory"

from The Free On-line Dictionary of Computing (8 July 2008)

probabilistic
stochastic

   <probability> Relating to, or governed by, probability. The
   behaviour of a probabilistic system cannot be predicted
   exactly but the probability of certain behaviours is known.
   Such systems may be simulated using {pseudorandom} numbers.
   {Evolutionary computation} uses probabilistic processes to
   generate new (potential) solutions to a problem.

   See also {deterministic}, {non-probabilistic}.

   (1995-09-22)