APA Dictionary of Psychology

a mood disorder in which an individual experiences persistent sadness or anhedonia and other symptoms similar to major depressive disorder or dysthymic disorder but without meeting the full criteria for either diagnosis, included in an appendix in DSM–IV–TR for proposed diagnostic categories needing further study. The other symptoms may include appetite, weight, or sleep changes; psychomotor agitation or psychomotor retardation; fatigue or loss of energy; feelings of worthlessness or guilt; difficulty concentrating or making decisions; and recurrent thoughts of death or suicide. It was not included in DSM-5 or DSM-5-TR.