Definitions for jejunumdʒɪˈdʒu nəm
Random House Webster's College Dictionary
the middle portion of the small intestine, between the duodenum and the ileum.
Origin of jejunum:
1350–1400; ME < ML jējūnum, n. use of neut. of L jējūnus (see jejune ); so called because thought to be empty after death
the part of the small intestine between the duodenum and the ileum
The central of the three divisions of the small intestine which lies between the duodenum and the ileum.
Origin: From ieiunum, neuter of ieiunus.
the middle division of the small intestine, between the duodenum and ileum; -- so called because usually found empty after death
U.S. National Library of Medicine
The middle portion of the SMALL INTESTINE, between DUODENUM and ILEUM. It represents about 2/5 of the remaining portion of the small intestine below duodenum.