Ulna

• POS: Noun
• HYPHEN: ul=na

CIDE DICTIONARY

Ulna, n. [L., the elbow. See Ell.].

•  The postaxial bone of the forearm, or brachium, corresponding to the fibula of the hind limb. See Radius.  [1913 Webster]
•  An ell; also, a yard.  Burrill.  [1913 Webster]

OXFORD DICTIONARY

Ulna, n. (pl. ulnae)
1 the thinner and longer bone in the forearm, on the side opposite to the thumb (cf. RADIUS 3).
2 Zool. a corresponding bone in an animal's foreleg or a bird's wing.

Derivative

ulnar adj.

Etymology

L, rel. to Gk olene and ELL