noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The bone of the forearm that extends from the elbow to the wrist on the side opposite to the thumb, corresponding to the fibula of the hind limb. Also, the corresponding bone in the forelimb of any vertebrate.
2. 2
   the inner and longer of the two bones of the human forearm wordnet

Synonyms

All synonyms

elbow bonebonecubitcubit

Etymology

From Latin ulna (“elbow”). Doublet of ell.

Related phrases

femur fibula ulna syndromeproximal ulna

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.