Variate

from WordNet (r) 3.0 (2006)

variate
    n 1: a variable quantity that is random [syn: {random variable},
         {variate}, {variant}, {stochastic variable}, {chance
         variable}]

from The Collaborative International Dictionary of English v.0.48

Variate \Va"ri*ate\, v. t. & i. [L. variatus, p. p. of variare.
   See {Vary}.]
   To alter; to make different; to vary.
   [1913 Webster]

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