Perhaps it would have been wiser still to have shut up his little mandible, or employed it only upon grub.
"Fringilla: Some Tales In Verse"
Richard Doddridge Blackmore
The bills of the true falcons are stronger, and have a notch in the lower mandible answering to a tooth in the upper one.
"Popular Adventure Tales"
Mayne Reid
Under the microscope, the head, with the eyes, mandible, and labrum, are well seen.
"The Student's Elements of Geology"
Sir Charles Lyell