Mandible
Pronunciation : Man"di*ble
Part of Speech : n.
Etymology : [L. mandibula, mandibulum, fr. mandere to chew. Cf. Manger.]
Definition : 1. (Anat.)
Defn: The bone, or principal bone, of the lower jaw; the inferior maxilla; -- also applied to either the upper or the lower jaw in the beak of birds.
2. (Zo?l.)
Defn: The anterior pair of mouth organs of insects, crustaceaus, and related animals, whether adapted for biting or not. See Illust. of Diptera.
Source : Webster's Unabridged Dictionary, 1913