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.
Symptoms include chronic diarrhea, weight loss and fatigue, but in some cases the disorder can be asymptomatic (no symptoms). Celiac disease is caused by a reaction to gliadin - a gluten protein found in wheat, barley, rye, and sometimes oats.