The Collaborative International Dictionary of English v.0.48:

Disparity \Dis*par"i*ty\, n.; pl. Disparities. [LL.
   disparitas, fr. L. dispar unlike, unequal; dis- + par equal:
   cf. F. disparit['e]. See Par, Peer.]
   Inequality; difference in age, rank, condition, or
   excellence; dissimilitude; -- followed by between, in, of, as
   to, etc.; as, disparity in, or of, years; a disparity as to
   color.
   [1913 Webster]

         The disparity between God and his intelligent
         creatures.                               --I. Taylor.
   [1913 Webster]

         The disparity of numbers was not such as ought to cause
         any uneasiness.                          --Macaulay.

   Syn: Inequality; unlikeness; dissimilitude; disproportion;
        difference.
        [1913 Webster]