D defs.my
Entry 2 senses Webster, 1913

Ulna

/(ŭl"nȧ)/ · Ul·na · IPA /ˈʌlnə/
01 n. The postaxial bone of the forearm, or brachium, corresponding to the fibula of the hind limb. See Radius.
  1. 1.
    The postaxial bone of the forearm, or brachium, corresponding to the fibula of the hind limb. See Radius.(Anat.) See: Radius
  2. 2.
    An ell; also, a yard.(O. Eng. Law)