peptic ulcer Word Originnoun Pathology.
- an erosion of the mucous membrane of the lower esophagus, stomach, or duodenum, caused in part by the corrosive action of the gastric juice.
- pathol an ulcer of the mucous membrane lining those parts of the alimentary tract exposed to digestive juices. It can occur in the oesophagus, the stomach, the duodenum, the jejunum, or in parts of the ileum
peptic ulcer in Medicine peptic ulcer n.
- An ulcer of the upper digestive tract, usually in the stomach or duodenum, where the mucous membrane is exposed to gastric secretions.