'Ulna' definitions:

Definition of 'ulna'

From: WordNet
noun
The inner and longer of the two bones of the human forearm [syn: ulna, elbow bone]

Definition of 'Ulna'

From: GCIDE
  • 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]