mesoduodenum

noun

me·​so·​duo·​de·​num ˌmez-ə-ˌd(y)ü-ə-ˈdē-nəm  ˌmēz- 

ˌmēs-,

ˌmes-,

-d(y)u̇-ˈäd-ᵊn-əm

plural mesoduodena -ˈdē-nə, -ᵊn-ə  or mesoduodenums

: the mesentery of the duodenum usually not persisting in adult life in humans and other mammals in which the developing intestine undergoes a counterclockwise rotation