ileum
noun [ C usually singular ] anatomy specialized uk/ˈɪl.i.əm/ us/ˈɪl.i.əm/ ilea uk/ˈɪl.i.ə/ us/ˈɪl.i.ə/
回肠（胃部下方，小肠末端和最窄的一段，负责从食物中吸收营养物质）
the last and narrowest part of the small intestine (= part of bowels after the stomach), where substances from food are absorbed