ulcer

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.

To ulcerate. Fuller, Holy and Profane State, V. vi. 3.

A sore in any of the soft parts of the body, open either to the surface or to some natural cavity, and attended with a secretion of pus or some kind of discharge; a solution of continuity of the skin of the body, or of the investing tissue of any natural cavity, the result of morbid action, not of mechanical injury nor of a healthy reparative process.

Hence, figuratively, a sore, blot, stain, or cause of reproach, in an ethical sense: as, an ulcer of the body politic.

A solution of continuity in any of the soft parts of the body, discharging purulent matter, found on a surface, especially one of the natural surfaces of the body, and originating generally in a constitutional disorder; a sore discharging pus. It is distinguished from an abscess, which has its beginning, at least, in the depth of the tissues.

Fig.: Anything that festers and corrupts like an open sore; a vice in character.

an ulcer on a finger or toe, due to deficient circulation and nutrition. In such cases the extremities are cold.

To ulcerate.

An open sore of the skin, eyes or mucous membrane, often caused by an initial abrasion and generally maintained by an inflammation and/or an infection.