Main Entry: la·brum

Pronunciation: \ˈlā-brəm\

Function: noun

Etymology: New Latin, from Latin, lip, edge — more at lip

Date: 1826

1 : an upper or anterior mouthpart of an arthropod consisting of a single median piece in front of or above the mandibles
2 : a ring of fibrous cartilage forming the margin of the shallow cavity of the upper part of the scapula by which the humerus articulates with the pectoral girdle