oxer
/ˈɒksə(r)/noun
1- an ox-fence or a fence resembling this牛栏; 类似牛栏的栅栏。
1.1
- (in showjumping) a jump consisting of a brush fence with a guard rail on one or both sides（越障马术比赛用语）一侧或两侧有护栏的障碍栏。