noun. the inner and longer of the two bones of the human forearm.
- elbow bone
- arm bone
- ulna (Latin)
Sentences with ulna
1. Noun, singular or mass
It snakes under your elbow and runs down the back of your forearm, along your ulna, which is the bone on the pinky finger side of your forearm.
Take another piece of spaghetti and break two pieces off to form the ulna bones.