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Definition of: ulna
(ul′nə) noun plural ·nae (-nē) or ·nas Anat.
In vertebrates above fishes, that one of the two long bones of the forearm or foreleg which forms a joint with the radius and is on the same side as the little finger or fifth digit. [<L, elbow]
—ul′nar adjective
A. Front view.
B. Back view.
a. Elbow joint.
b. Ulna.
c. Radius.
d. Wrist.
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