/ˈleɪbrəm/ (say 'laybruhm), /ˈlæbrəm/ (say 'labruhm)

noun (plural labra /ˈleɪbrə/ (say 'laybruh), /ˈlæbrə/ (say 'labruh))
1. a lip or lip-like part.
2. Zoology
a. the anterior unpaired member of the mouthparts of an arthropod, projecting in front of the mouth.
b. the outer margin of the aperture of a gastropod's shell.
3. Anatomy a ring of cartilage about the edge of a joint surface of a bone.
{Latin: lip}

Australian English dictionary. 2014.