Peptic ulcer disease refers to presence of painful sores on the linings of stomach, duodenum (first part of small intestine) and occasionally lower part of oesophagus. According to site ulcer is called as Gastric ulcer or Duodenal ulcer or Esophageal ulcer. Most common symptom is upper abdominal pain early in the morning.
Meaning of peptic means acid related problems. Again some people believe that peptic word may be derived from pepsin, a n enzyme produced at stomach that helps digestion.