The Collaborative International Dictionary of English v.0.48:

Spahi \Spa"hi\, Spahee \Spa"hee\, n. [Per., Turk., & Hind.
   sip[=a]h[imac]: cf. F. spahi. See Seroy.]
   1. Formerly, one of the Turkish cavalry.
      [1913 Webster]

   2. An Algerian cavalryman in the French army.
      [1913 Webster]