- Pathology. a sore on the skin or a mucous membrane, accompanied by the disintegration of tissue, the formation of pus, etc.
- any chronically corrupting or disrupting condition, element, etc.
- a disintegration of the surface of the skin or a mucous membrane resulting in an open sore that heals very slowlySee also
- a source or element of corruption or evil
c.1400, from Old French ulcere, from Vulgar Latin ulcerem, from Latin ulcus (genitive ulceris) “ulcer,” from PIE *elk-es- “wound” (cf. Greek elkos).
- A lesion of the skin or of a mucous membrane, such as the one lining the stomach or duodenum, that is accompanied by formation of pus and necrosis of surrounding tissue, usually resulting from inflammation or ischemia.
- A break in the skin or a mucous membrane, such as the one lining the stomach or duodenum, accompanied by inflammation, pus, and loss of tissue.
An inflamed open sore on theor . An ulcer may form in the inner lining of the or , interfere with , and cause considerable pain.