ulna

[uhl-nuh]

noun

plural

ulnae, ulnas 

1. Anatomy.,  the bone of the forearm on the side opposite to the thumb.

2. a corresponding bone in the forelimb of other vertebrates.

ulna

/ ˈʌlnə /

noun

1. the inner and longer of the two bones of the human forearm

2. the corresponding bone in other vertebrates

Other Word Forms

• ulnar adjective
• postulnar adjective

Word History and Origins

Origin of ulna¹

1835–45; < Latin: elbow; akin to Greek ōlénē, Old English eln ell ²

Word History and Origins

Origin of ulna¹

C16: from Latin: elbow, _ell ¹

Example Sentences

On June 13, a fastball rode inside and struck him in his right forearm, fracturing his ulna.

Read more on Seattle Times

Haniger left the game, and tests revealed a fractured ulna that required surgery.

Read more on Seattle Times

Jefferson, who had a deep passion for natural history, had received several bones, including the ulna, radius and claws, of an unknown animal.

Read more on Seattle Times

The UCL connects the humerus bone to ulna bone at the elbow.

Read more on Seattle Times

The creature’s two front fins had bones corresponding to our humerus, radius, ulna and wrist bones.

Read more on New York Times