ulcer Definition

ulcer
noun

1. pathol.
A persistent open sore, often accompanied by inflammation, on the surface of the skin or of the mucous membranes lining a body cavity.
Thesaurus: sore, canker, boil, abscess.
2. A continuing source of evil or corruption.

Derivative: ulcered
adj

Derivative: ulcerous
adj

Etymology: 14c: from Latin ulcus, ulceris, related to Greek helkos a sore.