Akademik

Labra
The plural of labrum, a ring of fibrocartilage (fibrous cartilage) around the edge of the articular (joint) surface of a bone. In Latin, "labrum" means "lip." The term is generally used to designate a lip, edge, or brim.
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Plural of labrum. [L.]

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la·bra (laґbrə) [L.] plural of labrum.

Medical dictionary. 2011.