noun
melancholic temperament
Historical term from the four humors theory; refers to a personality type associated with black bile. In modern contexts, it is mainly encountered in discussions of ancient or medieval medicine.
See also: 憂鬱質
古代医学では、黒胆汁質の人は憂鬱になりやすいと考えられていた。
In ancient medicine, people with a melancholic temperament were thought to be prone to depression.
憂鬱質 is a more modern term for melancholic temperament, while 黒胆汁質 is the older, humoral term.
Compound of 黒 (black), 胆汁 (bile), and 質 (quality/temperament), directly translating the concept of 'black bile temperament' from ancient Greek humoral theory.