ulna

/ˈʌl.nə/

名词

尺骨（前臂两根长骨之一，位于前臂内侧，连接肘内部）
He fractured his ulna while skateboarding, and had to wear a cast for several weeks to allow it to heal.
他在滑板过程中骨折了尺骨，不得不戴上石膏几周才能让它好起来。