a. [f. Gr. εὐρύ-ς broad + στόμα, στόματ-ος mouth + -OUS.] Wide-mouthed. Chiefly of serpents: Having a distensible mouth.
1878. Bell, trans. Gegenbaur’s Comp. Anat., 463. The two halves of the jaw are movably connected together in the eurystomatous Ophidii.
