Mandible

(n.) 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.

(n.) The anterior pair of mouth organs of insects, crustaceaus, and related animals, whether adapted for biting or not. See Illust. of Diptera.

手打:托德

• They arise from the palate, and are attached by flexible membrane to the sides of the mandible. 查尔斯·达尔文. 物种起源.
• The edges of the lower mandible are serrated with teeth much more prominent, coarser and sharper than in the duck. 查尔斯·达尔文. 物种起源.
• The edges of the lower mandible are crossed by numerous fine ridges, which project very little. 查尔斯·达尔文. 物种起源.

手打:托德