dyssebacea/dys·se·ba·cea/ (dis″se-ba´she-ah) disorder of sebaceous follicles; specifically, a condition seen (but not exclusively) in riboflavin deficiency, marked by greasy, branny seborrhea on the midface, with erythema in the nasal folds, canthi, or other skin folds.
Etymology: Gk, dys + L, sebum, suet
a skin condition characterized by red, scaly, greasy patches on the nose, eyelids, scrotum, and labia. It results from a deficiency of vitamin B2 and is most commonly associated with chronic alcoholism, liver disease, chronic diarrhea, and protein malnutrition. Also called
Usage notes: (informal)shark skin.