| 单词 | ulcer | 
| 释义 | ul·cer   (ŭlsər) n. 1.  A lesion of the skin or a mucous membrane such as the one lining the stomach or duodenum that is accompanied by formation of pus and necrosis of surrounding tissue, usually resulting from inflammation or ischemia. 2.  A corrupting condition or influence. [Middle English, from Old French ulcere, from Latin ulcus, ulcer-.] | 
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