1. symptoms that are not a direct result of a disorder but are associated with or incidental to those that are (e.g., social avoidance accompanying obsessive-compulsive disorder).

2. symptoms that appear in the second stage of a disorder or that are derived from an earlier traumatic event, disease process, or disordered condition.

3. according to Eugen Bleuler, those symptoms of schizophrenia, such as delusions and hallucinations, that are shared with other disorders and therefore not specifically diagnostic of schizophrenia. Bleuler theorized that these symptoms do not stem directly from the disease but rather begin to operate when the person reacts to some internal or external process. Also called accessory symptoms. Compare fundamental symptoms; primary symptoms.