What is the medical term for the inflammation of the intestine, especially the small intestine?

The medical term for inflammation of the intestine, particularly the small intestine, is "enteritis." This term is derived from "enteron," which means intestine in Greek, combined with the suffix "-itis," indicating inflammation. Enteritis can result from various causes, including infections, allergies, or inflammatory bowel diseases, and it specifically refers to the small intestine.

The other terms provided refer to different conditions or locations of inflammation. Appendicitis refers to inflammation of the appendix, diverticulitis involves inflammation of diverticula in the colon, and gastritis is the inflammation of the stomach lining. Each of these terms is distinct and pertains to a specific anatomical area or type of inflammation, making "enteritis" the most accurate choice for inflammation of the intestine, especially the small intestine.