D defs.my
Entry 1 sense Webster, 1913

Ulceration

/ŭlˌ-sẽr-āsh'-ən/ · Ul·cer·a·tion · IPA /ˌʌlsəˈɹeɪʃən/
01 n. The process of forming an ulcer, or of becoming ulcerous; the state of being ulcerated; also, an ulcer.
  1. 1.
    The process of forming an ulcer, or of becoming ulcerous; the state of being ulcerated; also, an ulcer.(Med.)