noun🔗Share십이지장The first part of the small intestine, starting at the lower end of the stomach and extending to the jejunum."The doctor examined the patient's duodenum to see if any ulcers were present in the first part of the small intestine. "의사는 환자의 십이지장을 검사하여 소장의 첫 부분에 궤양이 있는지 확인했다.anatomyorganbodymedicinephysiologypartChat with AIVocabulary GamePractice Reading