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.
Celiac disease causes your intestines to become swollen and to react badly to a protein called gluten (say: gloo-ten). Gluten is found in wheat, barley, and rye. Other names for celiac disease are celiac sprue and gluten-sensitive enteropathy.