ulceration

noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about ulceration at Wordnik → Where our words come from →

1. A circumscribed inflammatory and often suppurating lesion on the skin or an internal mucous surface resulting in necrosis of tissue.
2. The process of ulcer formation; the process of becoming ulcerated.