melano-, melan-, mela-, melen-

(Greek: the color black; dark)

Melanosis (disordered melanin production, or sulfur-containing pigments, with darkening of the skin) of the liver.
A word used through the years to refer to what is now called "depression".

In the humoral theory of the ancient Greeks it was the temperament caused by an excess of black bile. In modern psychiatric terminology melancholia is used to refer to especially severe forms of major depressive disorders.

melancholiac (s) (noun), melancholiacs (pl)
A person who experiences a psychological depression: Some older people who live alone tend to become melancholiacs when the seasons turn to fall and winter, when the days are dark and dreary, and when they don't have any relatives or friends who come and visit.
Another spelling of melancholia.
Black vomit or vomit discolored black in yellow fever and other conditions in which blood collects in the stomach.
melanemia, melanaemia
1. The presence of black, pigmentary masses in the blood; as in, hemochromatosis (pathology in which iron accumulates in the tissues; characterized by bronzed skin and enlarged liver and diabetes mellitus (a chronic disease associated with abnormally high levels of the sugar glucose in the blood) and abnormalities of the pancreas and the joints).
2. A morbid condition in which the blood contains black pigment either floating freely or imbedded in the white blood corpuscles.
An organism that thrives in or on black loam.
The existence of organisms that thrive in or on black loam.
A reference to organisms that thrive in or on black loam.

Other related "dark; shadow, shade; black" units: lygo-; nigri-; nocti-; nycti-; scoto-; skio-; umbra-.