Stenostome
Pronunciation : Sten"o*stome
Part of Speech : a.
Etymology : [Gr. steno`s narrow, little + sto`ma mouth.] (Zo?l.)
Definition : Defn: Having a small or narrow mouth; -- said of certain small ground snakes (Opoterodonta), which are unable to dilate their jaws.
Source : Webster's Unabridged Dictionary, 1913