ulceration

from WordNet (r) 3.0 (2006)

ulceration
    n 1: a circumscribed inflammatory and often suppurating lesion
         on the skin or an internal mucous surface resulting in
         necrosis of tissue [syn: {ulcer}, {ulceration}]
    2: the process of ulcer formation; the process of becoming
       ulcerated

from The Collaborative International Dictionary of English v.0.48

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]

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