Subtraction is the inverse of addition. 2. Either of two numbers or quantities that cancel each other out under a given mathematical operation. For example, the inverse of 5 under multiplication is 1 / 5, since 5 Ã 1 / 5 = 1.
Peptic ulcer disease refers to painful sores or ulcers in the lining of the stomach or first part of the small intestine, called the duodenum. No single cause has been found for ulcers. However, it is now clear that an ulcer is the end result of an imbalance between digestive fluids in the stomach and duodenum. Most ulcers are caused by an infection with a type of bacteria called Helicobacter pylori (H. pylori).
peptic. pertaining to pepsin or to digestion or to the action of gastric juices. peptic ulcer. an ulceration of the mucous membrane of the esophagus, stomach or duodenum, caused by the action of the acid gastric juice. There are two kinds of peptic ulcers: gastric ulcers occur in the stomach; duodenal ulcers occur in the duodenum, the part of the small intestine nearest the stomach.