labrum1

[ley-bruh m, lab-ruh m] /ˈleɪ brəm, ˈlæb rəm/
noun, plural labra
[ley-bruh, lab-ruh] /ˈleɪ brə, ˈlæb rə/ (Show IPA)
1.
a lip or liplike part.
2.
Zoology.
  1. the anterior, unpaired member of the mouthparts of an arthropod, projecting in front of the mouth.
  2. the outer margin of the aperture of a shell of a gastropod.
3.
Anatomy. a ring of cartilage about the edge of a joint surface of a bone.
Origin
1810-20; < Latin: lip; akin to labium

labrum2

[ley-bruh m] /ˈleɪ brəm/
noun, plural labra
[ley-bruh] /ˈleɪ brə/ (Show IPA). Archaeology
1.
an ornamented bathtub of ancient Rome.
Origin
< Latin lābrum basin, contraction of lavābrum bathtub, equivalent to lavā(re) to wash + -brum instrumental suffix
Examples from the web for labrum
  • Management of the throwing shoulder: cuff, labrum and internal impingement.
  • The procedure included clean up of the labrum and bursa and clean up and reinforcement of the rotator cuff.
British Dictionary definitions for labrum

labrum

/ˈleɪbrəm; ˈlæb-/
noun (pl) -bra (-brə)
1.
a lip or liplike part, such as the cuticular plate forming the upper lip of insects
Word Origin
C19: New Latin, from Latin
Word Origin and History for labrum
n.

lip or lip-like part, 1816, in various anatomical and zoological uses, from Latin labrum, cognate with labium "lip" (see lip (n.)). Also noted mid-15c. as the name of some herb.

labrum in Medicine

labrum la·brum (lā'brəm)
n. pl. la·bra (-brə)
A lip-shaped anatomical edge, rim, or structure.