mood disorder
Psychiatric term for a category of mental disorders characterized by disturbances in mood. Often used in clinical contexts; the more common term is 気分障害.
See also: 気分障害
気分症 is sometimes used as an older term for mood disorder.
Compound of 気分 (mood) and 症 (disease, condition). The exact historical derivation is uncertain; it appears as a clinical term in psychiatric contexts.