Source : Webster's Revised Unabridged Dictionary (1913)

Saddleback \Sad"dle*back`\, a.
   Same as {Saddle-backed}.

   {Saddleback roof}. (Arch.) See {Saddle roof}, under {Saddle}.

Source : WordNet®

saddleback roof
     n : a double sloping roof with a ridge and gables at each end
         [syn: {gable roof}, {saddle roof}, {saddleback}]