'Jejunum' definitions:

Definition of 'jejunum'

(from WordNet)
noun
The part of the small intestine between the duodenum and the ileum

Definition of 'Jejunum'

From: GCIDE
  • Jejunum \Je*ju"num\, n. [NL., fr. L. jejunus empty, dry.] (Anat.) The middle division of the small intestine, between the duodenum and ileum; -- so called because usually found empty after death. [1913 Webster]