ulna (noun)

1. In the comic, the hero's ulna was fractured during a fierce battle.

2. The design of the building featured a unique spiral staircase, inspired by the curvatures of the ulna bone.

3. In the futuristic world of the science fiction novel, humans had advanced robotic ulnas to enhance their strength.

4. During the excavation of an ancient burial site, archaeologists discovered a well-preserved ulna bone from a medieval knight.