'Ulceration' definitions:

Definition of 'ulceration'

From: WordNet
noun
A circumscribed inflammatory and often suppurating lesion on the skin or an internal mucous surface resulting in necrosis of tissue [syn: ulcer, ulceration]
noun
The process of ulcer formation; the process of becoming ulcerated

Definition of 'Ulceration'

From: GCIDE
  • Ulceration \Ul`cer*a"tion\, n. [L. ulceratio: cf. F. ulc['e]ration.] (Med.) The process of forming an ulcer, or of becoming ulcerous; the state of being ulcerated; also, an ulcer. [1913 Webster]