Meaning & use
Labrum
Last updated
A ring of cartilage that lines and deepens a ball-and-socket joint, such as the shoulder or hip; also a lip-like structure found in insects and other organisms.
See it in a sentence
The MRI revealed a small tear in the labrum of his shoulder joint.
In insects, the labrum forms the upper lip and helps direct food toward the mouth.
A note on using this word
Labrum tears are a common sports injury, particularly among athletes who repeatedly throw or perform overhead motions.
Another way to use it
2. noun
In entomology, a flap-like structure forming the upper lip of an insect's mouthparts.
The beetle's labrum shielded its mandibles as it fed on the leaf.
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