From Longman Dictionary of Contemporary Englishulcerateul‧cer‧ate /ˈʌlsəreɪt/ verb [intransitive, transitive] MIto form an ulcer, or become covered with ulcers —ulcerated adjective —ulceration /ˌʌlsəˈreɪʃən/ noun [uncountable]→ See Verb table
Examples from the Corpus
ulcerate• There is a tendency for mucous membranes to ulcerate and the ulcers to spread.