ulcer

The definition of an ulcer is an open sore on the surface of the skin or inside the body in a mucous membrane.

(noun)

An example of an ulcer is a sore in the stomach lining caused by a bacterial infection.

See ulcer in Webster's New World College Dictionary

noun

an open sore (other than a wound) on the skin or some mucous membrane, as the lining of the stomach (peptic ulcer), characterized by the disintegration of the tissue and, often, the discharge of pus
any corrupting or festering condition or influence

Origin: L ulcus (gen. ulceris) < IE *elkos-, abscess > Sans árśas-, hemorrhoids, Gr helkos, abscess, wound

See ulcer in American Heritage Dictionary 4

noun

A lesion of the skin or 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 corrupting condition or influence.

Origin:

Origin: Middle English

Origin: , from Old French ulcere

Origin: , from Latin ulcus, ulcer-

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