ulna Meaning, Definition & Usage

  1. noun the inner and longer of the two bones of the human forearm
    elbow bone.

WordNet

Ul"na noun
Etymology
L., the elbow. See Ell.
Definitions
  1. (Anat.) The postaxial bone of the forearm, or branchium, corresponding to the fibula of the hind limb. See Radius.
  2. (O. Eng. Law) An ell; also, a yard. Burrill.

Webster 1913