Labrum Latin, defined as "having the edge"
Labrum (architecture), a large water-filled vessel or basin with an overhanging lip
Labrum (arthropod mouthpart), a flap-like structure in front of the mouth in almost all extant Euarthropoda
Labrum (surname), an English surname
Acetabular labrum, a ring of cartilage that surrounds the acetabulum, the socket of the hip joint
Glenoid labrum, a lip-like projection of cartilage on the human scapula (shoulder blade) surrounding the joint between the humerus and the shoulder blade (Wikipedia) (See all definitions)