saddle seat

1. It had a saddle with springs sticking out, which wore away the seat of my pants
   鞍座上的弹簧翘出来，把我裤子臀部那块磨破了。
2. A wooden armchair with a saddle seat and a low back that has vertical spindles.
   有鞍状座位和直杆矮靠背的木制的扶手椅。
3. A wooden chair having a high spoked back, outward-slanting legs connected by a crossbar, and a saddle seat.
   高辐条靠背的一种木椅，横杆连接的椅腿向外倾斜，椅座鞍形。

noun

1. a chair seat that is slightly concave and sometimes has a thickened ridge in the center
   1. the saddle seat fitted his buttocks nicely