an abnormal narrowing of the valve at the outlet from the stomach, preventing normal passage of food into the small intestine.
pyloric stenosis n.
Narrowing of the gastric pylorus, especially by congenital muscular hypertrophy or by scarring resulting from a peptic ulcer.
- Pyloric valve
pyloric valve n. A fold of mucous membrane at the gastroduodenal junction, enclosing the pylorus.
- Pyloric vein
pyloric vein n. A vein that receives veins from both surfaces of the upper portion of the stomach, runs to the right along the lesser curvature, and empties into the portal vein. Also called right gastric vein.
pyloristenosis py·lo·ri·ste·no·sis (pī-lôr’ĭ-stə-nō’sĭs, pĭ-) or py·lo·ro·ste·no·sis (pī-lôr’ō-) n. Stricture or narrowing of the orifice of the pylorus.
pyloro- or pylor- pref. Pylorus: pylorospasm.