or·gan·ic dis·ease a disease in which anatomic or pathophysiologic changes occur in some bodily tissue or organ, in contrast to a functional disorder; particula

or·gan·ic dis·ease a disease in which anatomic or pathophysiologic changes occur in some bodily tissue or organ, in contrast to a functional disorder; particularly one of psychogenic origin. (this is the medical definition of "organic", which is completely different to the chemistry definition, which I think you confused it with).