megaduodenum

noun
mega·​du·​o·​de·​num | \ˌmeg-ə-ˌd(y)ü-ə-ˈdē-nəm; -d(y)u̇-ˈäd-ᵊn-əm \
plural megaduodena\ -​ˈdē-​nə; -​ᵊn-​ə \ or megaduodenums

Medical Definition of megaduodenum 

: a congenital or acquired dilation and elongation of the duodenum with hypertrophy of all layers that presents as a feeling of gastric fullness, epigastric pain, belching, heartburn, and nausea with vomiting sometimes of food eaten 24 hours before

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