ul·na
noun/ˈʌlnə/
/ˈʌlnə/
(plural ulnae
(anatomy)/ˈʌlniː/
/ˈʌlniː/
)- the longer bone of the two bones in the lower part of the arm between the elbow and the wrist, on the side opposite the thumb
enlarge image尺骨 Word Originlate Middle English (denoting the humerus bone): from Latin; related to ell.