in the DSM-IV-TR, a mood disorder marked by times of hypomanic indicators and times of depressive ones which happen over the span of two or more years, during which any period lacking indicators must persist no more than two months time. Indicators are those of hypomania or major depression, but the amount, duration, and level of seriousness of said indicators don't satisfy the complete standards for either type of episode.

CYCLOTHYMIC DISORDER: "Symptoms of Cyclothymic Disorder are often confused with those of Bipolar Type I Disorder."