Meaning of “ulcer” in the English Dictionary

"ulcer" in British English

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ulcernoun [ C ]

uk /ˈʌl.sər/ us /ˈʌl.sɚ/

a break in the skin, or on the surface of an organ inside the body, that does not heal naturally:

a mouth/stomach ulcer
ulcerous
adjective uk /ˈʌl.sər.əs/ us /ˈʌl.sɚ.əs/

(Definition of “ulcer” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"ulcer" in American English

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ulcernoun [ C ]

us /ˈʌl·sər/

a sore on the skin or inside the body that will not heal without treatment:

a stomach ulcer

(Definition of “ulcer” from the Cambridge Academic Content Dictionary © Cambridge University Press)