Source : Webster's Revised Unabridged Dictionary (1913)

Uvea \U"ve*a\, n. [NL., fr. L. uva grape.] (Anat.)
   The posterior pigmented layer of the iris; -- sometimes
   applied to the whole iris together with the choroid coat.

Source : WordNet®

uvea
     n : the part of the eye that contains the iris and ciliary body
         and choroid