The ulna is a long, thin bone in your forearm, on the opposite side of your arm from your thumb.
An example of ulna is a bone in your forearm.
nounpl. -·nae or -·nas
- the larger of the two bones of the forearm of humans, on the side opposite the thumb
- a corresponding bone in the forelimb of other land vertebrates
Origin of ulnaModern Latin from L, elbow: for Indo-European base see ell
nounpl. ul·nas, or ul·nae
- The bone extending from the elbow to the wrist on the side opposite to the thumb in humans.
- A corresponding bone in the forelimb of other vertebrates.
Origin of ulnaLatin elbow, forearm ; see el- in Indo-European roots.
(plural ulnae or ulnas)
From Latin ulna (“elbow").