Dictionary entry

Ulna

Webster's Dictionary 1913

‖Ul″na (ŭl″nȧ), n. [L., the elbow. See Ell.] 1. (Anat.) The postaxial bone of the forearm, or brachium, corresponding to the fibula of the hind limb. See Radius.

2. (O. Eng. Law) An ell; also, a yard. Burrill.