Source : Webster's Revised Unabridged Dictionary (1913)

Batta \Bat"ta\ (b[a^]t"t[.a]), n. [Prob. through Pg. for
   Canarese bhatta rice in the husk.]
   Extra pay; esp. an extra allowance to an English officer
   serving in India. --Whitworth.

Batta \Bat"ta\ (b[a^]t"t[.a]), n. [Hind. ba[.t][.t]a.]
   Rate of exchange; also, the discount on uncurrent coins.
   [India]