资料来源 : Webster's Revised Unabridged Dictionary (1913)

Redif \Re*dif"\, n. [Turk. red[=i]f, fr. rad[=i]f, orig., he who
   rides behind another on the same beast, fr. radaf to follow.]
   A reserve force in the Turkish army, or a soldier of the
   reserve. See {Army organization}, above.