Definition of ulcerate verb from the Oxford Advanced American Dictionary

 

ulcerate

 verb
verb
NAmE//ˈʌlsəˌreɪt//
 
[intransitive, transitive, usually passive]ulcerate (something)(medical)Verb Forms present simple I / you / we / they ulcerate
 
he / she / it ulcerates
 
past simple ulcerated
 
-ing form ulcerating
 
 
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to become, or make something become, covered with ulcers
NAmE//ˌʌlsəˈreɪʃn//
 
noun [uncountable, countable]
See the Oxford Advanced Learner's Dictionary entry: ulcerate