1. the upper lip or lip-like structure of an insect or other arthropod
Usage: anatomy; entomology
2. a rim or edge of cartilage around a joint socket, especially in the hip or shoulder
Usage: anatomy; medical

Examples

• The entomologist examined the beetle’s labrum under a microscope.
• Damage to the labrum can cause hip pain and reduced mobility.
• The insect’s labrum helps it manipulate food during feeding.
• An MRI revealed a tear in the shoulder labrum.
• The labrum provides stability to the ball-and-socket joint.
• Arthroscopic surgery was needed to repair the torn labrum.