ulna

In birds the ulna supports the great feathers of the wing, and this may account for the size of the bone.

The radius and ulna are parallel in the most natural position of supination.

This plate shows an attempt to wire the ulna in a clean wound.

After this we soon find that land is occasionally measured by the iron ulna of the king.

In medieval documents the Latin name for it is ulna, and probably the oldest English name for it is eln, elle, ell.