saddle tree

Noun

 * 1) The base on which the rest of the saddle is built. Usually based on wood or a similar synthetic material, it is eventually covered in leather or a leatherlike synthetic. The tree size determines its fit on the horse's back as well as the size of the seat for the rider.
 * 2) The tulip tree.

Translations

 * Finnish: satulan runko
 * French:
 * Interlingua: arcion
 * Italian:
 * Ottoman Turkish: قالتاق
 * Spanish:
 * Turkish: