The Collaborative International Dictionary of English v.0.48:

Rayah \Ra"yah\ (r[=a]"y[.a] or r[aum]"y[.a]), n. [Ar. ra'iyah a
   herd, a subject, fr. ra'a to pasture, guard.]
   A person not a Mohammedan, who pays the capitation tax.
   [Turkey.]
   [1913 Webster]