复数： ulnae ulnas
易混淆的单词： ULNA

Fracture of lower end of both ulna and radius .

尺骨和桡骨下端同时骨折。

Inside your forearm are two bones called the radius and the ulna .

人的前臂（forearm）由桡骨（radius）和尺骨（ulna）两根骨头构成。

Fractured his right ulna at age three .

三岁的时候右侧尺骨骨折。

Fracture of radius and ulna , open .

桡骨并尺骨开放性骨折。

The ulna is named from latin and latin in turn took the name ultimately from an indo-european root el meaning " forearm . "

其中尺骨－ulna这一名词来自拉丁文，而拉丁语中的这个词根源于印欧语词根“el”“前臂”。