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ulna
From The Collaborative International Dictionary of English v.0.48:
Ulna \Ul"na\ ([u^]l"n[.a]), 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. [1913 Webster] 2. (O. Eng. Law) An ell; also, a yard. --Burrill. [1913 Webster]
