Definition: The antiamylase test measures a protein found in the stomach wall, which helps differentiate between normal digestive processes from those that are harmful to the body. Definition: Antimylase refers to a specific enzyme present in the lining of the stomach wall, specifically on the inner surface (epithelial) layer. It is an important digestive enzyme for breaking down proteins, fats, and carbohydrates. The enzyme's action depends on its ability to cut through cell walls, which are often weakened by acidic pH levels within the stomach. Antimylase can help diagnose digestive disorders such as peptic ulcer disease or chronic gastritis.