cheekpiece
/ˈtʃiːkpiːs/noun
1- a part of an object which covers or rests on the cheek, in particular物体上罩住或贴着脸颊的部分, 尤指：
a smooth block fitted to the stock of a rifle or shotgun and resting against the face when aiming from the shoulder
瞄准时枪托上贴脸的平滑部分。
1.1
- either of the two straps of a horse's bridle joining the bit and the headpiece（连接嚼子和笼头的）马勒带 。
1.2
- a bar on a horse's bit which lies outside the mouth马嚼子上位于嘴外的勒条。