n.1. an obsolete term denoting pain or discomfort, usually in the head, that accompanies mental activity of a psychiatric nature (e.g., obsessions, hallucinations) and that is identified by the patient as emotional in origin. 2. a nonspecific psychogenic pain disorder. Also called psychalgalia. See also algopsychalia; psychic pain. [coined in 1884 by Scottish psychiatrist Thomas Smith Clouston (1840–1915)]