随机的
Stochastic \Sto*chas"tic\ (st[-o]*k[a^]s"t[i^]k), a. [Gr. stochastiko`s, from stocha`zesqai to aim, to guess, fr. sto`chos mark or aim.] 1. Conjectural; able to conjecture. [Obs.] --Whitefoot.
stochastic adj : being or having a random variable; "a stochastic variable"; "stochastic processes"
stochastic {probabilistic}