Main Entry: je·ju·num

Pronunciation: \ji-ˈjü-nəm\

Function: noun

Inflected Form(s): plural je·ju·na \-nə\

: the section of the small intestine that comprises the first two fifths beyond the duodenum and that is larger, thicker-walled, and more vascular and has more circular folds and fewer Peyer's patches than the ileum

[jejunum illustration]