n.
Pronunciation: ji- ' jü-n ə m
Function: noun
Inflected Form: plural je · ju · na \ -n ə \
Etymology: Middle English, from Medieval Latin, from neuter of Latin jejunus
Date: 14th century
: 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 than the ileum