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Duodenal is the doctor’s word for things that belong to the duodenum — the first, top stretch of the small bowel, sitting just under the stomach. Food leaves the stomach and goes into this short tube. When a doctor says a duodenal ulcer, they mean a sore in that stretch, not in the stomach itself (a stomach sore is a gastric ulcer). You almost never hear duodenal in the kitchen or the playground; it lives in hospitals, health news, and medical notes. It does not name the body part on its own: the part is the duodenum; duodenal tells you “of that part.”
十二指腸的（如十二指腸潰瘍 duodenal ulcer）
組成From duoden- (the duodenum) + -al (makes a describing word: “of or relating to”).
同家族的字
- duodenumthe body part this word describes
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
duodenaladj/ˌduəˈdinəl/
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Of or pertaining to the duodenum, the first part of the small intestine.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。