MEANING : (n.) an intelligent person with a non-social obsession (such as computer programming) that renders him/her annoying or unattractive.
Celiac disease is believed to be an autoimmune disorder. While genetics appear to play a role in causing it, some people at risk for celiac disease will not develop it until something triggers their immune system, such as a viral infection or severe emotional stress. An Introduction to Celiac Disease and Its Causes.
The precise cause of celiac disease isn't known. When the body's immune system overreacts to gluten in food, the immune reaction damages the tiny, hair-like projections (villi) that line the small intestine.