‖n. [ NL., fr. Gr. steno`s narrow. ] (Med.) A narrowing of the opening or hollow of any passage, tube, or orifice; as, stenosis of the pylorus. It differs from stricture in being applied especially to diffused rather than localized contractions, and in always indicating an origin organic and not spasmodic. [ 1913 Webster ]
a. [ Gr. steno`s narrow, little + sto`ma mouth. ] (Zool.) Having a small or narrow mouth; -- said of certain small ground snakes (Opoterodonta), which are unable to dilate their jaws. [ 1913 Webster ]