labrum
/ˈleɪbrəm/
noun
- A ring of cartilage in the shoulder joint that helps stabilize the joint.
- The athlete tore his labrum while throwing a baseball.
- Surgery can repair a damaged labrum and restore shoulder function.
- An MRI showed a small tear in her shoulder labrum.
- A lip-like structure, especially the upper lip of an insect or other arthropod.
- The labrum of a grasshopper helps hold food while it chews.
- Under the microscope, the insect's labrum was clearly visible.
- Biologists study the labrum to understand how insects feed.