(n) a circumscribed inflammatory and often suppurating lesion on the skin or an internal mucous surface resulting in necrosis of tissue, Syn. ulceration
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
n. [ L. ulceratio: cf. F. ulcération. ] (Med.) The process of forming an ulcer, or of becoming ulcerous; the state of being ulcerated; also, an ulcer. [ 1913 Webster ]