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Definition of ulna noun from the Oxford Advanced Learner's Dictionary

ulna

noun
 
/ˈʌlnə/
 
/ˈʌlnə/
(plural ulnae
 
/ˈʌlniː/
 
/ˈʌlniː/
)
(anatomy)
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  1. 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 see also radius (3)Topics Bodyc2
    Word Originlate Middle English (denoting the humerus bone): from Latin; related to ell.
See ulna in the Oxford Advanced American Dictionary
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baseball
noun
 
 
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