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 exact cause of celiac disease is unknown. The lining of the intestines have small areas called villi which project outward into the opening of the intestine. These structures help absorb nutrients. When people with celiac disease eat foods with gluten, their immune system reacts by damaging the villi.